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Ohaus Starter ST400M Portable pH & Conductivity Meter - 30468990


Ohaus Starter ST400M 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.

Built with IP67 waterproof housing as well as a rubber cover and IP67 probes, the ST400 is ideal for prolonged use in any field environment.

Rechargeable lithium battery provides 40 hours of uninterrupted use and more than 300 charge cycles - eliminating the need to change out batteries often.

The ST400M features intuitive software which guides the user through operation. All necessary information to run tests successfully such as electrode condition is displayed clearly on the large LCD.

Part Number: 30468990
Attribute nameAttribute value


Model :ST400M-B
pH Range :-2 to 16.00 pH
pH Resolution :0.01 pH
Conductivity Range :0.0 µS/cm to 199.9 mS/cm
Conductivity Resolution :0.1 µS/cm, Auto-Range
Temperature Range :-5 to 110 °C
Temperature Resolution :0.1 °C
TDS Range :0.1 mg/l to 199.9 g/l
TDS Resolution :0.01 mg/l, Auto-Range
Salinity Range :0.0 to 99.9 psu
Salinity Resolution :0.01 psu, Auto-Range
Resistivity Range :0 to 20 MΩ•cm
Resistivity Resolution :0.01 Ω•cm, Auto-Range
Includes :Meter w/IP67 Rubber Housing, Electrode Clip, Wrist Strap, 4 x AAA Batteries