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Ohaus ST3100-B | pH Bench Meter 2.00 - 16.00 pH | Cambridge Environmental

SKU: ST3100-B~ea

SKU: ST3100-B~ea

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The Starter Series from OHAUS

Delivering the highest quality measurement results while maintaining the best price to performance ratio in the market. Starter 3100 has many smart features that make it as intuitive as it is accurate for standard pH measurement.

Includes a standalone electrode holder.


  • Three-point calibration for high accuracy

  • Automatic and manual temperature compensation

  • Automatic and manual endpoint functions show reading stability

  • Height adjustable standalone electrode holder

  • Auto buffer recognition minimizes errors during calibration process

  • 99 memory sets for instant recall of recent calibration data

  • Self-diagnostic software

  • Icon display confirms accuracy of calibration process

  • Connection to peripheral devices through RS232 port

  • Resolution 0.01 pH; 1 mV; 0.1°C

  • Includes 3100 Meter with Standalone Electrode Holder; Quick reference guide with operating instructions

  • Display Type Backlit LCD

  • Clearly marked input keys

  • Built-in or standalone electrode holders

  • Reliable calibration for accurate measurement

  • Size: 220 x 175 x 78mm

  • Weight: 0.75kg

  • UNSPSC Code: 41115603



Measurement Range

-2.00 – 16.00 pH;  -1999 – 1999 mV;  -5 °C – 110 °C


±0.01 pH;  ±1 mV;  ±0.5 °C

Measurement Resolution

0.01 pH;  1 mV;  0.1 °C


LCD with backlight


ST310 Available as an accessory)

Accuracy ± (Temperature)

0.5 °C

Battery Life

Not Applicable


3 Point

Dimensions (HxLxW)

78 mm x 220 mm x 175 mm

In-use cover

Available as an Accessory

Measurement Range (Temperature)

-5 °C – 110 °C

Measurement Range

-1,999 mV – 1,999 mV

Net Weight

0.75 kg


pH / ORP

pH accuracy (±)


pH measuring range

-2 – 16

pH resolution



AC Adapter (Included)

Resolution (Voltage)

1 mV

Temperature Compensation


Temperature resolution

0.1 °C

Temperature Sensor


Working Environment

41°F – 104°F, 80%RH, non-condensing (5°C – 40°C, 80%RH, non-condensing)

Download: ST3100 Manual
Download: Starter Series Literature