ST20C-B Starter Pen Meter from Ohaus

Ohaus 30073976

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 pen meters that provide accurate measurement of pH, oxidation-reduction potential (ORP), conductivity, salinity, and total dissolved solids (TDS). Starter pen meters are the economical option when you are simply looking for meters that will provide accurate measurement without restriction.


pH, oxidation-reduction potential (ORP), conductivity, dissolved oxygen (DO), salinity, total dissolved solids (TDS), temperature measurement


Liquid crystal display (LCD) display with secondary information line (on select models)


4 1.5V batteries (included)




ABS Housing

Design Features

Easily replaceable electrodes, automatic shut off feature


Meter Type: Conductivity

Measurement Range: 0 – 1999 μs/cm; 0.0 – 99.0 °C; ±0.1 pH

Measurement Resolution: 1μs/cm

Display: LCD

ATC: Yes

Temperature Compensation: Automatic

Accuracy ± (Temperature): 0.5 °C

Automatic Shutdown: Yes, After 6 minutes of non-use

Battery Life: 200 Hours with Disposable Batteries

Calibration: 1 Point

Conductivity accuracy(±): 1.5 %

Conductivity measuring range: 0 – 1999 µS/cm

Dimensions (HxLxW): 7.28 in x 1.5 in x 1.77 in (185 mm x 38 mm x 45 mm)

Measurement Range (Temperature): 0 °C – 99 °C

Net Weight: 3.88 oz (110 g)

Number of Buttons: 3

Power: 4 AG13 Batteries (Included)

Protection Rating: IP67

Temperature Display: Yes

Temperature Range: 0 °C – 99 °C

Temperature Sensor: 50 KΩ NTC

Working Environment: 50°F – 104°F, 85%RH, non-condensing (10°C – 40°C, 85%RH, non-condensing)

Wrist Strap: Yes

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