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Ohaus Pen Meter ST20S Portable Salinity and Temperature Measurement Device

UsedOhausConductivity metersUnited States

From€142.09excl. VAT

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Meter Type
Salinity
Measurement Range
0.0 – 80.0 ppt; 0.0 – 99.0 °C
Accuracy
± 1.5% / ± 0.5 °C
Measurement Resolution
0.1 ppt
Display
LCD
All 26 specifications
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Specifications 26

Brands
Ohaus
New/Used
Used
Meter Type
Salinity
Measurement Range
0.0 – 80.0 ppt; 0.0 – 99.0 °C
Accuracy
± 1.5% / ± 0.5 °C
Measurement Resolution
0.1 ppt
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
0.0 – 80.0 ppt
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

Product description

Portable pen meter for salinity (0–80 ppt) and temperature (0–99 °C) with IP67 protection and automatic ATC.

The *Ohaus Pen Meter ST20S* Model #30073983 offers precise salinity and temperature measurements in a rugged, user-friendly pen meter format.

  • Measurement Type: Salinity and Temperature
  • Salinity Range: 0.0 – 80.0 ppt
  • Temperature Range: 0.0 – 99.0 °C
  • Accuracy: ±1.5% for salinity, ±0.5 °C for temperature
  • Resolution: 0.1 ppt
  • Display: LCD with temperature display
  • Temperature Compensation: Automatic (ATC) using 50 kΩ NTC sensor
  • Calibration: 1-point calibration
  • Power: 4 AG13 batteries included, ~200 hours battery life
  • Automatic Shutdown: After 6 minutes of inactivity to preserve battery
  • Durability: IP67 waterproof rating, protective cap for sensor and durable plastic housing
  • Dimensions: 185 mm x 38 mm x 45 mm (HxLxW)
  • Weight: 110 g (3.88 oz)
  • Operating Environment: 10°C – 40°C, 85% RH non-condensing
  • Additional Features: Wrist strap to prevent dropping, 3-operation buttons

This pen meter is designed for quick, reliable field measurements of salinity and temperature with a waterproof, impact-resistant housing suitable for rugged environments.

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Frequently asked questions

How long does laboratory equipment typically last?

With a service contract, ten to fifteen years is normal for most benchtop instruments. Detectors and pumps are the parts that wear first.

Can I get service for older equipment?

Often, yes. Verified suppliers frequently work with service partners converting the instrument. If applicable, we can list servicing options alongside the offer.

Where can I buy parts?

Ask a scientist through the request button. Parts are often available even when the instrument itself is discontinued.

What is the typical lead time for refurbished equipment?

Two to six weeks, depending on refurbishment scope and whether calibration is included.

Does laboratory equipment ship internationally?

We ship to 38 countries. Crating and customs handling are quoted with the instrument.

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Last updated 30 October 2026