Lovibond® SD40 Multi-Parameter pH / Conductivity / TDS / Salt / Temperature Meter | IP67 Waterproof Pocket Tester | Part No. 720040

The Lovibond® SD40 Multi is a compact, waterproof multi-parameter pocket tester designed for rapid measurement of pH, conductivity, TDS, salinity and temperature. With automatic temperature compensation, multi-point calibration, a 3-colour backlit LCD and IP67 protection, it is designed for routine water-quality testing in laboratories, industrial facilities, swimming pools and water-treatment applications.

Key Features

• 5-parameter measurement: pH, Conductivity, TDS, Salt & Temperature
• pH range: 0.00–14.00
• Conductivity range: 0.01–20.00 mS/cm
• TDS range: 0.01–20.00 ppt
• Salinity range: 0.01–10 g/L
• Automatic temperature compensation
• IP67 waterproof housing
• 3-colour backlit LCD
• Blue = measurement
• Green = calibration
• Red = alarm
• Up to 3 calibration points
• Automatic buffer recognition
• Stability indicator
• Auto-hold function
• Alarm-limit function
• Auto-off function
• Replaceable electrode
• Transparent protective lid
• Lid can serve as a stable stand
• Compact pocket-sized design
• 4 × AAA battery operation
• Battery life of more than 2,000 hours
• Lanyard and belt/pocket clip for convenient field use

Technical Specifications

The published datasheet specifies the measurement ranges, accuracy, resolution, IP67 protection, dimensions and battery specifications above.

Calibration

The SD40 supports 1- to 3-point calibration.

pH Calibration

Automatic buffer recognition supports:

USA buffers:
pH 1.68 / 4.00 / 7.00 / 10.01 / 12.45

NIST buffers:
pH 1.68 / 4.01 / 6.86 / 9.81 / 12.45

Conductivity Calibration

Supported standards include:

• 84 µS/cm
• 1,413 µS/cm
• 12 mS/cm

The instrument provides automatic calibration options and manual calibration adjustment.

Display & Operation

The SD40 uses a three-colour backlit LCD to simplify operation:

• 🔵 Blue: Measurement
• 🟢 Green: Calibration
• 🔴 Red: Alarm

The display also provides measurement and stability indications. Its three-button interface is designed for straightforward operation in laboratory and field environments.

Waterproof & Portable Design

The SD40 features an IP67 waterproof housing, making it suitable for routine measurements where water exposure is possible.

Its transparent protective lid helps with electrode maintenance and storage and can also provide a stable upright position for the tester. The supplied lanyard and clip make it convenient to carry during field measurements.

Applications

The Lovibond SD40 Multi is suitable for:

• Drinking-water treatment
• Wastewater treatment
• Swimming-pool water control
• Boiler-water monitoring
• Cooling-water monitoring
• Industrial water testing
• Chemical industry
• Food & beverage industry
• Pharmaceutical applications
• Aquaculture and marine applications
• Environmental water testing
• Laboratory water-quality testing
• Field water analysis

Lovibond specifically identifies boiler water, cooling water, drinking-water treatment, pool-water control and wastewater treatment among the applications for the SD Pocket Tester range.

What Can You Measure?

pH

Measures the acidity or alkalinity of aqueous samples over 0–14 pH.

Conductivity

Measures the electrical conductivity of water from 0.01 to 20.00 mS/cm, useful for assessing ionic content.

TDS

Measures Total Dissolved Solids from 0.01–20.00 ppt.

Salinity

Measures salt concentration from 0.01–10 g/L.

Temperature

Measures sample temperature from 0–50°C, with automatic temperature compensation for electrochemical measurements.

Advantages for Professional Users

One instrument, multiple parameters: Reduces the need to carry separate pH, conductivity, TDS and salinity meters.

Field-ready: Compact dimensions, battery operation, lanyard and IP67 protection make it convenient for mobile testing.

Easy calibration: Automatic buffer recognition and up to three calibration points simplify routine calibration.

Fast visual feedback: The colour-coded display distinguishes measurement, calibration and alarm conditions.

Long operating time: Four AAA batteries provide a published battery life exceeding 2,000 hours.

Standard / Supplied Accessories

Published configurations list the SD40 with accessories such as:

• SD40 Multi tester
• Protective/transparent lid
• 4 × AAA batteries
• Lanyard
• pH buffer tablets
• 3 M KCl storage solution
• Instruction manual
• Warranty declaration
• Certificate of compliance