pH/ORP TesTrode - All-in-one Tester

The pH/ORP TesTrode was designed to combine accuracy and affordability while providing all of the features and conveniences you would expect from a high performance handheld tester. With just 4 buttons, a large display and an intuitive user interface, it is easy to use for everyone from students to laboratory technicians.


  • Simple and ready to use
  • Standard 12mm replaceable electrode
  • Large, easy-to-read backlit display
  • 1,2, or 3-point calibration
  • Store and recall data with date and time stamp
  • Automatic temperature compensation
  • Alternate electrode options and accessories like an extension cable


  • pH/ORP range: 0.00 to 14.00 pH/ -1800 to 1800 mV ORP
  • pH/ORP resolution: 0.01 pH unis / 0.1,V (inside ±1000mV) and 1 mV (outside ±1000mV)
  • pH/ORP accuracy: ±0.02 pH units / ±20 mV ORP
  • Temperature range: 0 to 60°C or 32 to 140°F 
  • Temperature resolution: 0.1°C/°F
  • Temperature accuracy: ±1°C
  • Polycarbonate body housing, 12mm diameter, 4.4" length
  • Single-junction gelled Ag/AgCL reference (sealed)
  • Operating range: 0-60°C
  • Power: 2x CR2032 3V batteries (included); >25 hour life


  • Pool and spa
  • Aquarium and aquaculture 
  • Environmental or recreational water
  • Industrial waters
  • Drinking water and wastewater
  • General laboratory or education


Manufacturer : Analytical Sensors Inc.

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Parts & Accessories:

Cat.#DescriptionMfg.#PriceQuantityEstimated Availability
637-553-20Replacement electrode, standard pH/ORP/Temp, polycarbonateRH35-PEN1$145.59 EA  
Ships within one week
637-553-22Replacement electrode, epoxy body, pH/ORP/TempRH35-PEN2$163.13 EA  
Ships within one week
637-553-24Replacement electrode, standard pH/Temp, polycarbonateH035-PEN1$122.79 EA  
Ships within one week
637-553-26Replacement electrode, epoxy body, pH/TempH035-PEN2$122.79 EA  
Ships within one week
637-553-28Replacement electrode, flat sensor, pH/Temp, polycarbonateH035-PEN3$122.79 EA  
Ships within one week
637-553-30Replacement electrode, spear tip pH/Temp, polycarbonateH035-PEN4$140.33 EA  
Ships within one week

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