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Model 820 Portable Dissolved Oxygen Meter

Economy portable dissolved oxygen meter, 1 or 2 points calibration, manual salinity and barometric pressure compensation. The meter is suitable for outdoor applications. Accuracy: 0.5mg/L.

• Economy portable dissolved oxygen meter is equipped with a large LCD display.
• 1 or 2 points calibration using the air-saturated water and zero oxygen solution.
• Manual salinity and barometric pressure compensation improve the measurement accuracy.
• Automatic Temperature Compensation ensures accurate reading over the entire range.
• Data Hold function freezes measured value for easy viewing and recording.
• Help message as a operational guide that helps user quickly begin using the meter.
• Expanded memory stores and recalls up to 48 readings.
• Built-in real-time clock stamps stored data to meet GLP standard.
• Stored data can be transferred into computer by USB communication interface.


• Water and wastewater treatment
• Pond water and aquarium
• Aquaculture
• Industrial process monitoring
• Education and other applications


Model Sigma 820
Dissolved Oxygen
Range 0.0~20.0mg/L (or ppm)
Accuracy ±0.5mg/L
Resolution 0.1mg/L
% Saturation of Oxygen
Range 0.0~200.0%
Accuracy ±10% F.S
Resolution 0.1%
Calibration Points 1 or 2 points
Temperature Compensation 0~40°C, 32~104°F
Barometric Pressure Correction 60.0~112.5kPa, 450~850mmHg
Salinity Correction 0~35g/L
Hold Function Manual
Memory Stores up to 48 data sets
Output USB Communication Interface
Sensor Type DO100 Polarographic DO Probe
Power Requirements 1×9V/800mA Battery
Battery Life Approximately 150 hours
Dimensions 185(L)×88(W)×32(H)mm
Weight 300g