TempHion™ pH/ORP

  • Measures pH, ORP, and temperature

  • Or measures Bromide and temperature

  • RS485 network

  • Integrated datalogger collects 200,000+ records

  • Includes new Aqua4Plus software

    Dual protocol (Modbus® and SDI-12)


The TempHion™ is a submersible water quality sensor and datalogger that includes a pH/ORP element as well as one thermistor-based temperature element.

With a patented reference electrode, the TempHion provides long-term stability for continuous or intermittent monitoring—making unattended in-situ pH testing possible without frequent calibrations or service.


  • Easy-to-use in-field calibration utilities

  • 316 stainless steel, fluoropolymer, acetal, and PTFE construction

  • Solution ground for excellent noise protection

  • Operates on low power

  • Long-term sensor stability

  • Measures pH, ORP, and temperature

  • RS485 network

  • 200,000+ records stored in non-volatile memory

  • Dual protocol (Modbus® and SDI-12)

  • Narrow 0.75″ diameter, 17.625″ length

  • Available cableless or with a variety of cable options—polyethylene, polyurethane, or FEP

  • Easy export to spreadsheets and databases


  • Precise single- or multi-well tracer tests

  • Saltwater intrusion tracking

  • Tidal influence studies

  • Wastewater treatment discharge pH monitoring




  • TempHion, Bromide 316 Stainless, Cabled Cartridge Type

  • TempHion, pH/ORP 316 Stainless, Cableless

  • TempHion, pH/ORP 316 Stainless, Cabled Bulb Type

  • TempHion, pH/ORP Titanium, Cableless