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HM Digital Professional Waterproof ORP Meter & Thermometer

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  In Stock
  •   Model # ORP-200
  •   UPC 891144000045
  •   Brand HM Digital

Ideal for all ORP testing, including anti-oxidant measurement, water purification applications, ionizers, agriculture, aquariums & aquaculture, chlorine monitoring, cooling tower disinfection, environmental testing, fruit & vegetable washing, hydroponics, metal finishing, ozone system monitoring, pharmaceutical & medical applications, pools & spas, pulp bleaching, vineyards & wineries and water treatment.


  • Measures Oxidation Reduction Potential (Redox) and Temperature
  • Auto-ranging calibration with digital fine tuning
  • Includes 4 pH buffer solution in a sponge embedded in a clear cap
  • Waterproof housing (IP-67 rating)
  • Simultaneous temperature display
  • Digital Calibration (push button)
  • Auto-off function, data-hold function and low-battery indicator
  • Display: large and easy-to-read LCD screen includes simultaneous temperature reading
  • Factory Calibrated: The ORP-200 meter is factory calibrated to +200 mV The meter can be easily recalibrated with digital calibration using the push buttons, rather than a screwdriver
  • Includes a cap, batteries, and lanyard


  • ORP Range: -999 to +1000 mV
  • Temperature Range: 0-80 °C; 32-176 °F
  • Resolution: 1 mV; Temperature resolution is 0.1 °C/F
  • Accuracy: 0.5% (±2mV)
  • Calibration: Digital calibration by push button.
  • Electrode: Replaceable glass sensor and reference tube electrodes
  • Housing: IP-67 Waterproof (submersible; floats)
  • Power source: 3 x 1.5V button cell batteries (included)
  • Dimensions: 18.5 x 3.4 x 3.4 cm (7.3 x 1.3 x 1.3 inches)
  • Weight: 96.4 g (3.4 oz)