{"product_id":"hm-digital-com-100-waterproof-professional-ec-tds-temperature-meter","title":"HM Digital COM-100 Waterproof Professional EC\/TDS\/Temperature Meter","description":"\u003ch1\u003eHM Digital COM-100 Waterproof Professional EC\/TDS\/Temperature Meter\u003c\/h1\u003e\n\u003ch2\u003eProduct Name\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHM Digital COM-100 Professional Waterproof EC\/TDS\/Temperature Meter | 0–9990 µS\/cm EC | 0–8560 ppm TDS | Automatic Temperature Compensation | Replaceable Sensor\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eBrand\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHM Digital\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eModel\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCOM-100\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eProduct Series\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eProfessional Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eProduct Category\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWater Quality Testing Instruments → EC \/ TDS Meters\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eProduct Type\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDigital EC, TDS \u0026amp; Temperature Combo Meter\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eShort Product Description\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eHM Digital COM-100\u003c\/strong\u003e is a professional-grade, waterproof \u003cstrong\u003eEC\/TDS\/Temperature meter\u003c\/strong\u003e designed for comprehensive water-quality testing. It measures \u003cstrong\u003eElectrical Conductivity (EC), Total Dissolved Solids (TDS), and temperature\u003c\/strong\u003e, with multiple EC and TDS scales for different water-testing applications.\u003c\/p\u003e\n\u003cp\u003eThe meter offers an EC range up to \u003cstrong\u003e9990 µS\/cm \/ 9.99 mS\u003c\/strong\u003e, TDS measurement up to \u003cstrong\u003e8560 ppm\u003c\/strong\u003e, automatic temperature compensation, digital push-button calibration, a replaceable sensor and \u003cstrong\u003eIP67 waterproof protection\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eProduct Overview\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eHM Digital COM-100\u003c\/strong\u003e is designed for users who require more than a basic TDS tester.\u003c\/p\u003e\n\u003cp\u003eUnlike simple TDS meters, the COM-100 provides multiple measurement modes for \u003cstrong\u003eEC and TDS\u003c\/strong\u003e, allowing users to select the appropriate scale depending on the application and type of water being tested.\u003c\/p\u003e\n\u003cp\u003eIt can measure:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eElectrical Conductivity (EC)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTotal Dissolved Solids (TDS)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTemperature\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe COM-100 also incorporates \u003cstrong\u003eAutomatic Temperature Compensation (ATC)\u003c\/strong\u003e and uses different temperature coefficients and conversion factors to provide more appropriate readings across different water types.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eKey Features\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eProfessional-grade EC\/TDS\/temperature meter\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMeasures \u003cstrong\u003eEC, TDS and temperature\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEC range up to \u003cstrong\u003e9990 µS\/cm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEC range up to \u003cstrong\u003e9.99 mS\/cm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTDS range up to \u003cstrong\u003e8560 ppm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTDS range up to \u003cstrong\u003e8.56 ppt\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports \u003cstrong\u003e0.5 NaCl\u003c\/strong\u003e TDS scale\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports \u003cstrong\u003e0.7 442™\u003c\/strong\u003e TDS scale\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMultiple EC\/TDS measurement modes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAutomatic Temperature Compensation (ATC)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThree temperature coefficients\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNon-linear EC-to-TDS conversion\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eKCl, NaCl and 442™ conversion factors\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDigital push-button calibration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCalibration to any point within the meter's range\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIP67 waterproof housing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFully submersible\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMeter floats when submerged\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReplaceable sensor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSensor model \u003cstrong\u003eSP-C1\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLarge LCD display\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSimultaneous temperature display\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eData-hold function\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAutomatic shut-off\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLow-battery indicator\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUpgraded translucent protective cap\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIncludes 2 × AAA batteries\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIncludes lanyard\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFactory calibrated with \u003cstrong\u003e1413 µS solution\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch1\u003eTechnical Specifications\u003c\/h1\u003e\n\u003ctable style=\"width: 119.793%; height: 1225.63px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 83.477%; height: 19.5938px;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"width: 14.2028%; height: 19.5938px;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003eHM Digital\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003eCOM-100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 39.1875px;\"\u003eSeries\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 39.1875px;\"\u003eProfessional Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 58.7812px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 58.7812px;\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 58.7812px;\"\u003eEC \/ TDS \/ Temperature Meter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eEC Range\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003e0–9990 µS\/cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eEC Range\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003e0–9.99 mS\/cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 10px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 10px;\"\u003eTDS Range\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 10px;\"\u003e0–8560 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTDS Range\u003c\/td\u003e\n\u003ctd\u003e0–8.56 ppt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTDS Scale\u003c\/td\u003e\n\u003ctd\u003e0.5 NaCl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTDS Scale\u003c\/td\u003e\n\u003ctd\u003e0.7 442™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e0–55°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 196.75px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 196.75px;\"\u003eTemperature Range\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 196.75px;\"\u003e32–130°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 78.375px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 78.375px;\"\u003eEC Resolution\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 78.375px;\"\u003e0.1 µS \/ 1 µS \/ 10 µS depending on range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 78.375px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 78.375px;\"\u003eTDS Resolution\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 78.375px;\"\u003e0.1 ppm \/ 1 ppm \/ 10 ppm depending on range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003emS Resolution\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003e0.01 mS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eppt Resolution\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003e0.01 ppt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eTemperature Resolution\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003e0.1°C \/ 0.1°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eAccuracy\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003e±2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 39.1875px;\"\u003eTemperature Compensation\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 39.1875px;\"\u003eAutomatic (ATC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eTemperature Coefficients\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eEC\/TDS Conversion\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003eNon-linear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 39.1875px;\"\u003eConversion Factors\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 39.1875px;\"\u003eKCl \/ NaCl \/ 442™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 39.1875px;\"\u003eCalibration\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 39.1875px;\"\u003eDigital push-button\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 58.7812px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 58.7812px;\"\u003eCalibration Range\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 58.7812px;\"\u003eAny point within meter range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eFactory Calibration\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003e1413 µS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 58.7812px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 58.7812px;\"\u003eSensor\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 58.7812px;\"\u003eDetachable platinum electrodes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eReplacement Sensor\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003eSP-C1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eWaterproof Rating\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003eIP67\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eSubmersible\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eFloating Design\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eDisplay\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003eLarge LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eTemperature Display\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003eSimultaneous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eData Hold\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eAuto Shut-Off\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eLow Battery Indicator\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 39.1875px;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 39.1875px;\"\u003e2 × AAA batteries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 39.1875px;\"\u003eDimensions\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 39.1875px;\"\u003e18.5 × 3.4 × 3.4 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003e127 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 83.477%; height: 19.5938px;\"\u003eUPC\u003c\/td\u003e\n\u003ctd style=\"width: 14.2028%; height: 19.5938px;\"\u003e891144000007\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThese specifications reflect HM Digital's current COM-100 product information.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eEC Measurement\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eEC = Electrical Conductivity\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEC measures the ability of water to conduct electrical current. It is commonly used as an indicator of the concentration of dissolved ionic substances.\u003c\/p\u003e\n\u003ch3\u003eCOM-100 EC Range\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e0–9990 µS\/cm\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eor\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e0–9.99 mS\/cm\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eEC Resolution\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasurement Range\u003c\/th\u003e\n\u003cth align=\"right\"\u003eResolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e0–99 µS\u003c\/td\u003e\n\u003ctd align=\"right\"\u003e0.1 µS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100–999 µS\u003c\/td\u003e\n\u003ctd align=\"right\"\u003e1 µS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1000–9990 µS\u003c\/td\u003e\n\u003ctd align=\"right\"\u003e10 µS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e0–9.99 mS\u003c\/td\u003e\n\u003ctd align=\"right\"\u003e0.01 mS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch1\u003eTDS Measurement\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eTDS = Total Dissolved Solids\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTDS represents the concentration of dissolved substances in water and is generally expressed in \u003cstrong\u003eppm\u003c\/strong\u003e or \u003cstrong\u003emg\/L\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe COM-100 supports multiple TDS scales instead of using a single fixed conversion factor.\u003c\/p\u003e\n\u003ch3\u003eTDS Range\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e0–8560 ppm\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eor\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e0–8.56 ppt\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eAvailable TDS Scales\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e0.5 NaCl Scale\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eand\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e0.7 442™ Scale\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe meter allows the user to select the appropriate conversion mode for the application.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eWhy Multiple TDS Scales Matter\u003c\/h1\u003e\n\u003cp\u003eDifferent types of dissolved substances can produce different relationships between EC and TDS.\u003c\/p\u003e\n\u003cp\u003eThe COM-100 therefore provides different conversion factors rather than simply multiplying EC by one fixed number.\u003c\/p\u003e\n\u003cp\u003eThe supported conversion approaches include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eKCl\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eNaCl\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e442™\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe manufacturer's manual describes these as non-linear conversions intended to better represent different types of water and applications.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eAutomatic Temperature Compensation\u003c\/h1\u003e\n\u003cp\u003eThe COM-100 includes \u003cstrong\u003eAutomatic Temperature Compensation (ATC)\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eElectrical conductivity changes as water temperature changes. The meter therefore compensates for temperature differences to help provide more consistent EC\/TDS readings.\u003c\/p\u003e\n\u003cp\u003eThe COM-100 uses \u003cstrong\u003ethree temperature coefficients\u003c\/strong\u003e associated with its measurement scales.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eWaterproof IP67 Housing\u003c\/h1\u003e\n\u003cp\u003eThe COM-100 has an \u003cstrong\u003eIP67 waterproof housing\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThis means the meter is designed for protection against dust ingress and temporary immersion under the conditions defined by the IP67 rating.\u003c\/p\u003e\n\u003cp\u003eHM Digital specifically describes the COM-100 as:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\"submersible; floats.\"\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis makes it particularly convenient for direct testing of water samples.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eReplaceable Sensor\u003c\/h1\u003e\n\u003cp\u003eThe COM-100 uses a \u003cstrong\u003edetachable platinum electrode sensor\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eSensor Model\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSP-C1\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe replaceable sensor allows users to replace the electrode rather than replacing the complete meter when the sensor reaches the end of its usable life.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eDigital Calibration\u003c\/h1\u003e\n\u003cp\u003eThe COM-100 uses \u003cstrong\u003edigital push-button calibration\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eUnlike meters that require a screwdriver for calibration, the COM-100 allows calibration through its buttons.\u003c\/p\u003e\n\u003cp\u003eThe meter is factory calibrated using a \u003cstrong\u003e1413 µS conductivity solution\u003c\/strong\u003e and can subsequently be recalibrated to a desired point within its measurement range.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eDisplay\u003c\/h1\u003e\n\u003cp\u003eThe COM-100 features a large, easy-to-read LCD display.\u003c\/p\u003e\n\u003cp\u003eThe display provides:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eEC\/TDS measurement\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMeasurement unit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTemperature\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBattery status\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHold indication where applicable\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTemperature can be displayed simultaneously with the primary measurement.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eData Hold Function\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eData Hold\u003c\/strong\u003e function freezes the displayed measurement.\u003c\/p\u003e\n\u003cp\u003eThis is useful when the meter is being used in a location where it is difficult to continuously view the screen.\u003c\/p\u003e\n\u003cp\u003eTypical uses include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eRecording water-quality measurements\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eComparing samples\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eField testing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLaboratory measurements\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRO service inspections\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch1\u003eAutomatic Shut-Off\u003c\/h1\u003e\n\u003cp\u003eThe COM-100 includes an automatic shut-off feature designed to conserve battery power.\u003c\/p\u003e\n\u003cp\u003eOlder HM Digital documentation specifies automatic shut-off after approximately \u003cstrong\u003e5 minutes of inactivity\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eLow Battery Indicator\u003c\/h1\u003e\n\u003cp\u003eThe meter includes a \u003cstrong\u003elow-battery indicator\u003c\/strong\u003e, allowing the user to identify when the batteries need replacement.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003ePower Supply\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eBattery:\u003c\/strong\u003e 2 × AAA\u003c\/p\u003e\n\u003cp\u003eThe current upgraded COM-100 package includes two AAA batteries.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eDimensions \u0026amp; Weight\u003c\/h1\u003e\n\u003ch3\u003eDimensions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e18.5 × 3.4 × 3.4 cm\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e7.3 × 1.3 × 1.3 inches\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eWeight\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e127 g\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe compact handheld design makes it suitable for both laboratory and field applications.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eApplications\u003c\/h1\u003e\n\u003ch2\u003eWater Purification\u003c\/h2\u003e\n\u003cp\u003eThe COM-100 can be used to compare conductivity\/TDS before and after filtration and purification.\u003c\/p\u003e\n\u003ch2\u003eRO Water Testing\u003c\/h2\u003e\n\u003cp\u003eUseful for monitoring water quality associated with reverse-osmosis systems.\u003c\/p\u003e\n\u003cp\u003eIt can help compare:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeed Water → RO Water → Filtered Water\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eDrinking Water\u003c\/h2\u003e\n\u003cp\u003eCan be used for general conductivity and TDS monitoring of tap and filtered water.\u003c\/p\u003e\n\u003ch2\u003eHydroponics\u003c\/h2\u003e\n\u003cp\u003eEC is an important parameter for monitoring nutrient solutions.\u003c\/p\u003e\n\u003cp\u003eThe COM-100 can provide EC readings useful for hydroponic nutrient management.\u003c\/p\u003e\n\u003ch2\u003eAquaculture\u003c\/h2\u003e\n\u003cp\u003eUseful for monitoring conductivity\/TDS conditions in aquatic systems.\u003c\/p\u003e\n\u003ch2\u003eAquariums\u003c\/h2\u003e\n\u003cp\u003eThe multiple EC\/TDS modes make the meter useful for freshwater and other aquarium applications.\u003c\/p\u003e\n\u003ch2\u003eSwimming Pools \u0026amp; Spas\u003c\/h2\u003e\n\u003cp\u003eCan be used for conductivity\/TDS monitoring as part of broader water-quality testing.\u003c\/p\u003e\n\u003ch2\u003eWastewater\u003c\/h2\u003e\n\u003cp\u003eSuitable for general conductivity monitoring in wastewater applications.\u003c\/p\u003e\n\u003ch2\u003eBoilers \u0026amp; Cooling Towers\u003c\/h2\u003e\n\u003cp\u003eEC monitoring can be useful for tracking dissolved ionic content in industrial water systems.\u003c\/p\u003e\n\u003ch2\u003eLaboratories\u003c\/h2\u003e\n\u003cp\u003eThe COM-100 can be used for general laboratory water-quality measurements.\u003c\/p\u003e\n\u003ch2\u003eEnvironmental Testing\u003c\/h2\u003e\n\u003cp\u003eUseful for field measurements and environmental water monitoring.\u003c\/p\u003e\n\u003cp\u003eHM Digital specifically lists water purification, wastewater regulation, aquaculture, hydroponics, laboratories, pools\/spas, ecology testing, boilers\/cooling towers and water treatment among the COM-100 applications.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eRecommended Mode by Application\u003c\/h1\u003e\n\u003cp\u003eHM Digital's COM-100 guide provides examples of suitable modes for different applications.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eSuggested Mode\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrinking Water\u003c\/td\u003e\n\u003ctd\u003eppm-442 \/ ppm-NaCl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Filtration\u003c\/td\u003e\n\u003ctd\u003eppm-442 \/ ppm-NaCl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRO \/ Purification\u003c\/td\u003e\n\u003ctd\u003eppm-442 \/ ppm-NaCl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHydroponics\u003c\/td\u003e\n\u003ctd\u003eFollow nutrient manufacturer's requirements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAquariums\u003c\/td\u003e\n\u003ctd\u003eppm-NaCl \/ ppm-KCl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReef Tanks\u003c\/td\u003e\n\u003ctd\u003eppm-NaCl \/ ppm-KCl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColloidal Silver\u003c\/td\u003e\n\u003ctd\u003eppm-NaCl \/ ppm-442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePools \u0026amp; Spas\u003c\/td\u003e\n\u003ctd\u003eppm-NaCl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCar Washing\u003c\/td\u003e\n\u003ctd\u003eppm-442 \/ ppm-NaCl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWindow Washing\u003c\/td\u003e\n\u003ctd\u003eppm-442 \/ ppm-NaCl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoffee\u003c\/td\u003e\n\u003ctd\u003eppm-442 \/ ppm-NaCl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e These are suggested modes, not universal requirements. Where a chemical, nutrient or equipment manufacturer specifies a particular measurement scale, that scale should be used.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eHow to Use\u003c\/h1\u003e\n\u003ch3\u003e1. Remove the Protective Cap\u003c\/h3\u003e\n\u003cp\u003eRemove the translucent protective cap from the sensor.\u003c\/p\u003e\n\u003ch3\u003e2. Turn On the Meter\u003c\/h3\u003e\n\u003cp\u003ePress the power button.\u003c\/p\u003e\n\u003ch3\u003e3. Select the Measurement Mode\u003c\/h3\u003e\n\u003cp\u003eChoose the required EC\/TDS measurement mode.\u003c\/p\u003e\n\u003ch3\u003e4. Immerse the Sensor\u003c\/h3\u003e\n\u003cp\u003ePlace the electrode into the water sample.\u003c\/p\u003e\n\u003cp\u003eEnsure that the sensing area is sufficiently immersed.\u003c\/p\u003e\n\u003ch3\u003e5. Wait for Stabilization\u003c\/h3\u003e\n\u003cp\u003eAllow the reading to stabilize.\u003c\/p\u003e\n\u003ch3\u003e6. Read the Measurement\u003c\/h3\u003e\n\u003cp\u003eRecord the EC, TDS and temperature values shown on the display.\u003c\/p\u003e\n\u003ch3\u003e7. Use Hold if Required\u003c\/h3\u003e\n\u003cp\u003ePress the Hold function to freeze the reading.\u003c\/p\u003e\n\u003ch3\u003e8. Rinse the Sensor\u003c\/h3\u003e\n\u003cp\u003eAfter testing, rinse the sensor appropriately and replace the protective cap.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eCalibration\u003c\/h1\u003e\n\u003cp\u003eFor reliable measurements, periodic calibration is recommended.\u003c\/p\u003e\n\u003ch3\u003eBasic Calibration Procedure\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cp\u003ePrepare a suitable certified conductivity calibration solution.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTurn on the COM-100.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSelect the appropriate EC mode.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRinse the sensor.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePlace the sensor into the calibration solution.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAllow the measurement to stabilize.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePerform digital calibration using the meter buttons.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRinse the sensor after calibration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReplace the protective cap.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eThe COM-100 is factory calibrated at \u003cstrong\u003e1413 µS\u003c\/strong\u003e, according to HM Digital.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eCare \u0026amp; Maintenance\u003c\/h1\u003e\n\u003cp\u003eFor longer sensor life:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eRinse the electrode after use.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eKeep the sensor clean.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAvoid scratching the platinum electrodes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDo not use abrasive materials on the sensor.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCalibrate periodically.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDo not store the sensor dry for extended periods unless the manufacturer's instructions specifically permit it.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReplace the sensor when it becomes damaged or readings cannot be stabilized properly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch1\u003eAdvantages\u003c\/h1\u003e\n\u003ch3\u003e1. 3-in-1 Measurement\u003c\/h3\u003e\n\u003cp\u003eMeasures:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEC + TDS + Temperature\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e2. Multiple Conversion Scales\u003c\/h3\u003e\n\u003cp\u003eSupports different EC\/TDS conversion methods for different applications.\u003c\/p\u003e\n\u003ch3\u003e3. Professional Grade\u003c\/h3\u003e\n\u003cp\u003eDesigned for professional water-quality testing.\u003c\/p\u003e\n\u003ch3\u003e4. IP67 Waterproof\u003c\/h3\u003e\n\u003cp\u003eCan be submerged for water testing.\u003c\/p\u003e\n\u003ch3\u003e5. Replaceable Sensor\u003c\/h3\u003e\n\u003cp\u003eThe SP-C1 sensor can be replaced separately.\u003c\/p\u003e\n\u003ch3\u003e6. Digital Calibration\u003c\/h3\u003e\n\u003cp\u003eConvenient push-button calibration.\u003c\/p\u003e\n\u003ch3\u003e7. Automatic Temperature Compensation\u003c\/h3\u003e\n\u003cp\u003eHelps compensate for temperature-related changes.\u003c\/p\u003e\n\u003ch3\u003e8. Wide Measurement Range\u003c\/h3\u003e\n\u003cp\u003eUp to \u003cstrong\u003e9990 µS EC\u003c\/strong\u003e and \u003cstrong\u003e8560 ppm TDS\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003e9. Portable\u003c\/h3\u003e\n\u003cp\u003eCompact handheld design suitable for laboratory and field testing.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eIdeal For\u003c\/h1\u003e\n\u003cp\u003eThe HM Digital COM-100 is ideal for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eRO technicians\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWater-treatment professionals\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWater filtration companies\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLaboratory technicians\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHydroponic growers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAquaculture professionals\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAquarium users\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePool and spa technicians\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEnvironmental testing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIndustrial water treatment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBoiler operators\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCooling tower operators\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eResearch laboratories\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWater-quality professionals\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHome water testing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch1\u003eProduct Highlights for Website\u003c\/h1\u003e\n\u003ch3\u003ePROFESSIONAL 3-IN-1 WATER TESTING\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEC + TDS + Temperature\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eWIDE EC RANGE\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e0–9990 µS\/cm | 0–9.99 mS\/cm\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eHIGH TDS RANGE\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e0–8560 ppm | 0–8.56 ppt\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eIP67 WATERPROOF\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSubmersible \u0026amp; Floating Design\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eAUTOMATIC TEMPERATURE COMPENSATION\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAdvanced ATC with Multiple Temperature Coefficients\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eREPLACEABLE SENSOR\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSP-C1 Detachable Platinum Electrode\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eDIGITAL CALIBRATION\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003ePush-Button Calibration\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eMULTIPLE TDS SCALES\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eNaCl | 442™ | KCl\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eProduct Comparison Positioning\u003c\/h1\u003e\n\u003cp\u003eThe COM-100 is positioned above basic single-parameter TDS meters because it provides:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEC + TDS + Temperature + Multiple Scales + ATC + Replaceable Sensor + IP67 Waterproofing\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis makes it particularly appropriate for professional users who need more detailed water-quality measurements.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003ePackage Contents\u003c\/h1\u003e\n\u003cp\u003eThe upgraded COM-100 package includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e1 × HM Digital COM-100 Meter\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e1 × SP-C1 Detachable Sensor\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e1 × Translucent Protective Cap\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2 × AAA Batteries\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e1 × Lanyard\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eUser Documentation\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eHM Digital's current product page specifically lists the translucent cap, two AAA batteries and lanyard as upgraded included accessories.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eE-Commerce Filter Specifications\u003c\/h1\u003e\n\u003ctable style=\"width: 100%; height: 607.408px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 47.62%; height: 19.5938px;\"\u003eAttribute\u003c\/th\u003e\n\u003cth style=\"width: 49.6262%; height: 19.5938px;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003eHM Digital\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003eCOM-100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003eProfessional Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eProduct Category\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003eWater Quality Testing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eMeasurement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003eEC + TDS + Temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eEC Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003e0–9990 µS\/cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eEC Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003e0–9.99 mS\/cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eTDS Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003e0–8560 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eTDS Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003e0–8.56 ppt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eAccuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003e±2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eTemperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003e0–55°C \/ 32–130°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eTemperature Resolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003e0.1°C \/ 0.1°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eATC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eCalibration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003eDigital Push Button\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eConversion Factors\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003eKCl \/ NaCl \/ 442™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eTDS Scales\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003e0.5 \/ 0.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eSensor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003eDetachable Platinum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eSensor Model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003eSP-C1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eWaterproof\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eIP Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003eIP67\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eSubmersible\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eFloating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eData Hold\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eAuto Shut-Off\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eLow Battery Indicator\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 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19.5938px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003e127 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 47.62%; height: 19.5938px;\"\u003e\u003cstrong\u003eUPC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 49.6262%; height: 19.5938px;\"\u003e891144000007\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch1\u003eSuggested HSN Code\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eSuggested HSN:\u003c\/strong\u003e 9027\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCategory:\u003c\/strong\u003e Instruments and apparatus for physical or chemical analysis.\u003c\/p\u003e\n\u003cp\u003eFor your Indian e-commerce listing, verify the final HSN\/GST classification against your actual purchase invoice and current tax treatment before publishing it as a definitive tax attribute.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eCountry of Origin\u003c\/h1\u003e\n\u003cp\u003eCurrent Indian marketplace information lists the \u003cstrong\u003eRepublic of Korea\u003c\/strong\u003e as the country of origin for the HM Digital COM-100.\u003c\/p\u003e\n\u003cp\u003eFor your website, however, the safest practice is to verify the \u003cstrong\u003ecountry of origin printed on the actual product packaging\/import documentation in your inventory\u003c\/strong\u003e before publishing.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eSEO Product Title\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eHM Digital COM-100 Professional EC\/TDS Meter | Waterproof IP67 | 0–9990 µS\/cm | 0–8560 ppm | Temperature Meter | ATC | Replaceable Sensor\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch1\u003eSEO Meta Title\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eHM Digital COM-100 EC\/TDS Meter | Professional Waterproof Water Tester\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch1\u003eSEO Meta Description\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eBuy HM Digital COM-100 Professional EC\/TDS\/Temperature Meter with 0–9990 µS\/cm EC range, 0–8560 ppm TDS, IP67 waterproof housing, ATC, digital calibration and replaceable sensor.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch1\u003eSEO Keywords\u003c\/h1\u003e\n\u003cp\u003eHM Digital COM-100, HM Digital COM100, COM-100 TDS meter, HM Digital TDS meter, HM Digital EC meter, EC TDS meter, professional TDS meter, waterproof TDS meter, digital TDS meter, conductivity meter, EC meter, water quality tester, water testing meter, TDS EC temperature meter, RO water tester, RO TDS meter, hydroponic EC meter, aquaculture water tester, aquarium TDS meter, pool water tester, IP67 TDS meter, HM Digital water tester, TDS meter India, EC meter India.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eRecommended Website Category\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eWater Testing Instruments → EC \/ TDS Meters → Professional Combo Meters\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eRelated Products\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eHM Digital AP-2\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHM Digital AP-1\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHM Digital EC-3\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHM Digital COM-100L\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHM Digital COM-300\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHM Digital COM-360\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHM Digital PH-80\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHM Digital PH-200\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHM Digital ORP-200\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHM Digital TDS-3\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHM Digital TDS-EZ\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch1\u003eOne-Line Selling Description\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eHM Digital COM-100 is a professional waterproof EC\/TDS\/temperature meter featuring 0–9990 µS\/cm EC measurement, up to 8560 ppm TDS, multiple conversion scales, automatic temperature compensation, digital calibration, IP67 protection and a replaceable platinum sensor for advanced water-quality testing.\u003c\/strong\u003e\u003c\/p\u003e","brand":"HM DIGITAL","offers":[{"title":"Default Title","offer_id":47227693564077,"sku":"HM DIGITAL COM-100","price":5500.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/7666\/9357\/files\/ChatGPTImageAug15_2026_11_56_30AM.png?v=1786775208","url":"https:\/\/rinstruments.com\/products\/hm-digital-com-100-waterproof-professional-ec-tds-temperature-meter","provider":"Rinstruments","version":"1.0","type":"link"}