Ohaus Starter 400D-G Portable Dissolved Oxygen Meter

OhausSKU: 30378542


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High-Performance, Low-Maintenance Dissolved Oxygen (DO) Meter with Optical Technology for Accurate Measurements

For over a century, OHAUS has perfected the art of measurement through our line of weighing products. Taking the same approach to our weighing equipment, OHAUS now delivers Starter ST400D - a practical, affordable, low-maintenance DO Portable Meter equipped with optical technology. The ST400D is ideal for applications that require simple yet accurate DO measurements.


Field and lab Dissolved Oxygen measurement


Backlit Color Liquid Crystal Display (LCD)


4 AAA batteries (included)


ABS Housing

Design Features

99 measurement memory, last calibration data recall, auto barometric pressure measurement, auto temperature compensation with manual salinity compensation


Measurement Range 0.00 – 20.0 mg/L(ppm);  0 – 50 °C
Accuracy ±0.2 mg/L(<  8 mg/L) or ±0.3 mg/L(8~20 mg/L);  ±0.3 °C
Measurement Resolution 0.01 mg/L;  0.1 °C;  0.1%
Display Color LCD Graphics
Electrode STDO21 (Included)
Accuracy DO 0.2 ppm
Accuracy ± (Temperature) 0.3 °C
Battery Life 12 hours with Disposable Batteries
Calibration 2 Point
Dimensions 1.38 in x 5.91 in x 3.54 in (35 mm x 150 mm x 90 mm)
In-use cover No
Measurement Range DO 0 ppm – 20 ppm
Measurement Range (Temperature) 0 °C – 50 °C
Net Weight 0.35 lb (0.16 kg)
Parameter Dissolved Oxygen
Power 4 AAA (LR03) Batteries (Included)
Resolution (DO) 0.01
Temperature Compensation Automatic
Temperature Resolution 0.1 °C
Temperature Sensor 10 KΩ NTC
Working Environment 41°F – 104°F, 80%RH, non-condensing (5°C – 40°C, 80%RH, non-condensing)



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