Ohaus ST400M Portable pH and Conductivity Meter

Starter 400M Portable Water Analysis Meters are robust, lightweight, and battery-operated units with a waterproof housing.  They are ideal for prolonged use in wet environments. 

A rechargeable lithium battery ensures hours of trouble-free testing in the field while intuitive software and an easy-to-view LCD allow for simple operation.  They are equipped with a large storage capacity and the ability to transfer data easily via USB. 

Specifications:

• 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
• Measurement Resolution: 01 pH;  1 mV;  0.1 μs/cm;  0.01 mg/L;  0.01 psu;  0.01 Ω•cm;  0.1 °C
• Accuracy ±: ±0.01 pH;  ±1 mV;  ± 0.5 % F.S.;  ±0.3 °C
• Display: LCD Backlit Display
• Probe: ST320 IP67 3m (Not Included in ST400M-B);  STCON3 IP67 3m (Not Included in ST400M-B)
• Accuracy ± (mV): 1 mV
• Accuracy ± (Temperature): 3 °C
• Battery Life: 40 hours with Disposable Batteries
• Conductivity Accuracy (±): 5 %
• Conductivity Measuring Range: 01 μS/cm-199.9 mS/cm
• Dimensions: 57 in x 9.05 in x 3.94 in (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: 77 lb (0.35 kg)
• pH Accuracy: 01
• pH Measuring Range: -2 - 16
• pH Resolution: 01
• Resistivity Measurement Range: 0 MOhm – 20 MOhm
• Resistivity Resolution: 01 MOhm
• Resolution (Voltage): 1 mV
• Temperature Compensation: Automatic
• Temperature Resolution: 1 °C
• Temperature Sensor: 30 KΩ NTC
• Working Environment: 41°F – 104°F, 80%RH, non-condensing (5°C – 40°C, 80%RH, non-condensing)

ST400M Compatible Probes:

• pH electrode, IP67, 3m cable – ST320
• Conductivity Probe, IP67, 3m cable – STCON3

Starter Series Data Sheet
ST400M Manual