ST3100M-N Starter 3100M PH & Conductivity Bench Meter from Ohaus

Ohaus 30332140

Save time, space and money with the Starter 3100M Bench Meter, which combines all your pH, ORP, conductivity, TDS, salinity, resistivity and temperature measurements - in one smart device. Ideal for a wide range of lab applications, the ST3100M is incredibly easy to use. Equipped with software to ensure the reliability of your readings, and RS232 connectivity to store and transfer data conveniently, the ST3100M is a great addition to your lab.


pH, Oxidation-Reduction Potential (ORP), Conductivity, Total Dissolved Solids (TDS), Salinity, Resistivity and Temperature Measurements


Backlit liquid crystal display (LCD), touchscreen


AC adapter (included)


RS232 (included)


ABS housing, in-use cover, mechanical keys

Design Features

Three point calibration (pH), electrode condition icon, parameter toggle button, compact design


Measurement Range: 00.0 μS/cm – 199.9 mS/cm; -5 °C – 110 °C; -2.00 – 20.00 pH; -1999 – 1999 mV; 0-20 MΩ•cm; ± 0.5 % F.S.; ±0.01 pH; ±0.3 °C; ±1 mV

Measurement Resolution: 0.01 μS/cm; 0.1 °C; 0.01 pH; 1 mV; 0.01 Ω•cm

ATC: Yes

Display: LCD, backlight

Electrode: ST230 (Included); STTEMP30 (Included); STCON3 (Included)

Accuracy ± (mV): 1 mV

Accuracy ± (Temperature): 0.3 °C

Battery Life: Not Applicable

Conductivity accuracy (±): 0.5 %

Conductivity measuring range: 0.0 – 199.9 µS/cm

Dimensions (HxLxW): 3.07 in x 6.89 in x 8.66 in (78 mm x 175 mm x 220 mm)

In-use cover: Included

Measurement Range (Temperature):-5 °C – 110 °C

Measurement Range: -1,999 mV – 1,999 mV

Net Weight: 2.09 lb (0.95 kg)

pH accuracy (±): 0.01

pH measuring range: -2 – 20

pH resolution: 0.01

Power: 100 - 240 V

Resolution Cond. (Variable): 0.01 – 200

Resolution (Voltage): 1 mV

Temperature Compensation: Automatic

Temperature Resolution: 0.1 °C

Temperature Sensor: 30 KΩ NTC

Working Environment: 14°F – 104°F, 85%RH, non-condensing (-5°C – 40°C, 85%RH, non-condensing)

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