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Ohaus Pen Meter ST20 Portable pH and Temperature Meter with IP67 Protection

UsedOhausElectrochemistryUnited States

€124.56excl. VAT

In stock

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Meter Type
pH
Measurement Range
0.00 – 14 pH; 0.0 – 99.0 °C
Accuracy
± 0.05 pH / ± 0.5 °C
Measurement Resolution
0.01 pH
Display
LCD
All 26 specifications
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Specifications 26

Brands
Ohaus
New/Used
Used
Meter Type
pH
Measurement Range
0.00 – 14 pH; 0.0 – 99.0 °C
Accuracy
± 0.05 pH / ± 0.5 °C
Measurement Resolution
0.01 pH
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
3 Point
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
pH accuracy (±)
0.05
pH measuring range
0 – 14
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, waterproof pH pen meter with automatic temperature compensation, 0-14 pH range, ±0.05 pH accuracy, auto shutoff.

Ohaus Pen Meter ST20 Model #30073971

  • Meter Type: pH measurement with temperature sensing
  • Measurement Range: pH 0.00–14.00; Temperature 0.0–99.0 °C
  • Accuracy: ±0.05 pH; ±0.5 °C
  • Resolution: 0.01 pH
  • Display: LCD
  • Automatic Temperature Compensation (ATC): Yes
  • Calibration: 3-point calibration for improved accuracy
  • Power: 4 AG13 disposable batteries included, approx. 200 hours battery life
  • Automatic Shutdown: Activates after 6 minutes of inactivity to preserve battery
  • Protection Rating: IP67 waterproof design suitable for rugged usage and accidental submersion
  • Enclosure: Durable plastic housing with protective sensor cap
  • Additional Features: Wrist strap to prevent accidental dropping
  • Dimensions: 7.28 in x 1.5 in x 1.77 in (185 mm x 38 mm x 45 mm)
  • Weight: 3.88 oz (110 g)
  • Operating Environment: 10°C – 40°C (50°F – 104°F), 85% relative humidity, non-condensing
  • Temperature Sensor: 50 KΩ NTC thermistor
  • User Interface: 3-button operation for straightforward use

This pen-style meter facilitates fast, accurate pH and temperature measurements in field and laboratory conditions, combining durability and ease of use with essential electrochemical measurement capabilities.

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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 22 October 2026