Lutron DO-5509 Pocket Dissolved Oxygen Meter

The Lutron DO-5509 is a compact, high-precision dissolved oxygen meter designed for reliable field and laboratory measurements. This portable device features a polarographic probe with integrated temperature sensor for accurate dissolved oxygen readings across various applications. ISO-9001 and CE certified, this professional-grade instrument delivers consistent performance for water quality assessment in aquaculture, research, environmental monitoring, and educational settings.

Professional Accuracy - Precise measurements with ±0.4 mg/L accuracy after calibration
Wide Measurement Range - Measures dissolved oxygen from 0 to 20.0 mg/L
Polarographic Sensor Technology - Industry-standard measurement methodology for reliable results
Automatic Temperature Compensation - Ensures accurate readings from 0 to 40°C
Integrated Temperature Sensor - Built into probe for simultaneous oxygen and temperature readings
Easy Calibration - Dedicated ZERO and CAL adjustment knobs for simple field calibration
Pocket-Sized Design - Compact dimensions (131 × 70 × 25 mm) for portability
Extended Probe Cable - 4-meter cable length for flexible measurement locations
Clear Digital Display - Large 13 mm (0.5") LCD screen with 3½ digit readout
Low Power Consumption - Approximately 3.5 mA for extended battery life
Complete Package - Includes probe, carrying case, spare parts, and electrolyte solution
Durable Construction - Robust design for field and laboratory use

Parameter	Specification
Measurement Range	Dissolved Oxygen: 0 to 20.0 mg/L
Resolution	0.1 mg/L
Accuracy	±0.4 mg/L (after calibration at 23±5°C)
Temperature Compensation	Automatic from 0 to 40°C
Sensor Type	Polarographic with integrated temperature sensor
Calibration Controls	ZERO knob, CAL knob