Ohaus Starter 400M Portable Multi-Parameter Meters

OhausSKU: 30468992


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Available to Order


Durable Waterproof Battery-Operated pH and Conductivity Meters Ideal for Field Testing

Starter 400M Multi Parameter Portable Water Analysis Meters are robust, lightweight, battery-operated units with waterproof housing, which are ideal for testing pH, conductivity, TDS, salinity and resistivity in wet environments. A rechargeable lithium battery ensures hours of trouble-free testing in the field. Intuitive software and an easy-to-view LCD allows for simple operation. A built-in USB port enables easy data transfer.

Supplied with ST400M Meter, IP67 rubber housing, electrode clip, USB cable,4 AAA batteries, ST320 pH sensor (IP67, 3m cable), STCON3 conductivity sensor (IP67, 3m cable), portable bag and pH buffer sachet set


pH, ORP conductivity, total dissolved solids (TDS), salinity, resistivity, temperature


Backlit liquid crystal display (LCD)


Rechargeable Li-battery, 2600mAh; > 300 charge and discharge times


Micro - USB (included)


ABS housing, replaceable in-use cover

Design Features

IP67 waterproof and dustproof design, 1000 memory data storage, indication of electrode status


Measurement Range -2.00 – 16.00 pH;  -1999 – 1999 mV;  00.0 μS/cm – 199.9 mS/cm;  0.1 mg/L – 199.9 g/L (TDS);  0-99.9 psu;  0-20 MΩ•cm;  -5 °C – 110 °C
Accuracy ±0.01 pH;  ±1 mV;  ± 0.5 % F.S.;  ±0.3 °C
Measurement Resolution 0.01 pH;  1 mV;  0.1 μs/cm;  0.01 mg/L;  0.01 psu;  0.01 Ω•cm;  0.1 °C
Display LCD Backlit Display
Electrode ST320 IP67 3m (Included);  STCON3 IP67 3m (Included)
Accuracy ± (mV) 1 mV
Accuracy ± (Temperature) 0.3 °C
Battery Life 40 Hours with Rechargeable Battery
Conductivity accuracy (±) 0.5 %
Conductivity measuring range 0.01 μS/cm-199.9 mS/cm
Dimensions 40 mm x 230 mm x 100 mm (HxLxW)
Measurement Range (Temperature) -5 °C – 110 °C
Measurement Range -1,999 mV – 1,999 mV
Net Weight (0.35 kg
pH accuracy (±) 0.01
pH measuring range -2 – 16
pH resolution 0.01
Resistivity measuring range 0 MOhm – 20 MOhm
Resistivity resolution 0.01 MOhm
Resolution Cond. (Variable) 0.1 – 199.9
Resolution (Voltage) 1 mV
Temperature Compensation Automatic
Temperature Resolution 0.1 °C
Temperature Sensor 30 KΩ NTC
Working Environment 5°C – 40°C, 80%RH, non-condensing



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