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OHAUS™ Starter ORP Pen Meters

Portable ORP measurement.

Supplier:  OHAUS™ 30073984

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Catalog No. 01-922-071

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ST10R and ST20R can bring measurement of ORP to virtually anywhere you need to measure the availability of electrons in a liquid. Both models provide almost instantaneous results and the ST20R offers the ability to freeze the reading right on the display to provide additional time for data logging.

  • Fast, straightforward results
  • Durable IP67 waterproof design
  • Equipped with wrist strap for security
  • Range: -1000mV to 1000mV
  • Resolution: 1 mV
  • Accuracy: 2mV
  • Automatic Shutdown after six minutes of non-use
  • Requires four AG13 1.5V Micro Alkaline Batteries
  • Size/Weight: 185 × 45 × 38 mm, 110 g



ORP Pen Meter
-1000 to +1000 mV
1 mV
0 to 50°C
0.23 lb.
Measure the availability of electrons in a liquid
-1000 to +1000 mV
2 mV
Micro Alkaline
Model ST10R
105 g
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