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Ohaus ST20S Salinity Pen Meter

SKU: ST20S~ea

SKU: ST20S~ea

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Ohaus ST20S Salinity Pen Meter with Temperature Display

Starter pen meters provide what should be expected of a small pen meter:  simple, fast, straightforward, no-frills yet highly accurate operation time and time again.  They are the economical option when you are looking for accurate measurements with no restrictions.

With durable plastic housing, a protective cap that safeguards the sensor, and an automatic shutdown feature to preserve battery life, the Starter pen meters can endure consistent use in rugged environments.

Equipped with a wrist strap that helps to prevent unintentional dropping, Starter pen meters are constructed with an IP67 waterproof design that can prevent water damage when accidentally dropped into liquid.


  • Meter Type: Salinity
  • Measurement Range: 0 – 80.0 ppt;  0.0 – 99.0 °C
  • Accuracy ±: 5% / 0.5 °C
  • Measurement Resolution: 1 ppt
  • Display: LCD
  • ATC: Yes
  • Temperature Compensation: Automatic
  • Accuracy ± (Temperature): 5 °C
  • Automatic Shutdown: Yes, after 6 minutes of non-use
  • Battery Life: 200 hours with disposable batteries
  • Calibration: 1-point
  • Conductivity Accuracy ±: 5%
  • Conductivity Measuring Range: 0 – 80.0 ppt
  • Dimensions: 5 in x 7.28 in x 1.77 in (38 mm x 185 mm x 45 mm) (LxHxW)
  • Measurement Range (Temperature): 0 °C ;  99 °C
  • Net Weight: 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

Starter Pen Meters Data Sheet
ST20S Manual