ORP-301 Pensize ORP Redox Tester -1200~1200mV Water Quality Measurement ±2mV High Accuracy Oxidation Reduction Potential Meter

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This device is commonly used in measurement of Water Disinfection, the stronger the ORP, the faster the microbe is killed. Oxidation Reduction Potential (ORP) was found to be a reliable indicator of bacteriological water quality.

Inexpensive and practical tester with wide range of application – from household to laboratory and industrial (drinking water test, in aquariums, artificial reservoirs, wastewater), swimming pools, water treatment systems, aquaculture, spa, etc.


  • Compact pen size and light weight for mobility
  • IP65 waterproof level
  • HOLD Function
  • Auto power off after 10 min of idle
  • Automatic calibration function
  • Selectable temperature unit (°C/°F)
  • Low battery indicator


  • Measurement range: -1200~1200mV
  • Accuracy (@25°C/77°F): ±2mV ORP; ±0.5°C Temp.
  • Resolution: 1mV ORP; 0.1°C Temp
  • Calibration: Automatic
  • Auto off: after 10 min
  • ATC: 0~60°C (32~140°F)
  • Operating Environment: 0~60°C (32~140°F); RH <90%
  • Battery: 3 x 1.5V (LR44 button cell battery)
  • Dimension: approx. 187 x 37 x 37mm
  • Weight: approx. 80gms

Set Includes:

  • 1 x  ORP Tester
  • English Instruction Manual
  • Standard factory packaging

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