OHAUS ST3100-B pH Meter: After more than a century of perfecting the art of measurement through our durable weighing products, OHAUS precision is now available in a line of benchtop pH meters. Starter 3100 has many smart features that make it as intuitive as it is accurate for standard pH measurement.
pH, oxidation-reduction potential (ORP) measurement
Backlit liquid crystal display (LCD)
AC adapter (included)
RS232 (included)
ABS housing, standalone electrode holder, replaceable in-use cover
Design Features
99 measurement memory, automatic and manual endpoint functions, automatic and manual temperature compensation, quick reference guide


Measurement Range-2.00 – 16.00 pH;  -1999 – 1999 mV;  -5 °C – 110 °C
Accuracy±0.01 pH;  ±1 mV;  ±0.5 °C
Measurement Resolution0.01 pH;  1 mV;  0.1 °C
DisplayLCD with backlight
ElectrodeST310 Available as an accessory)
Accuracy ± (mV)1 mV
Accuracy ± (Temperature)0.5 °C
Battery LifeNot Applicable
Calibration3 Point
Dimensions3.07 in x 8.66 in x 6.89 in (78 mm x 220 mm x 175 mm) (HxLxW)
In-use coverAvailable as an Accessory
Measurement Range (Temperature)-5 °C – 110 °C
Measurement Range-1,999 mV – 1,999 mV
Net Weight1.65 lb (0.75 kg)
ParameterpH / ORP
pH accuracy (±)0.01
pH measuring range-2 – 16
pH resolution0.01
PowerAC Adapter (Included)
Resolution (Voltage)1 mV
Temperature CompensationYes
Temperature Resolution0.1 °C
Temperature Sensor30 KΩ NTC
Working Environment41°F – 104°F, 80%RH, non-condensing (5°C – 40°C, 80%RH, non-condensing)
Berat4 kg


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