pH Sensors

All pHionics pH sensors have 4-20 mA outputs and are fully submersible.  They also include built-in temperature compensation, a solution ground, and electrical isolation.

STs Series Conductivity Water Quality Sensor and Transmitter

The D-phi Series™

  • Differential electrode that never requires replacement
  • 1″ diameter
  • Built-in NPT threads for pipe mounting
  • Titanium and Delrin® housing

Recommended for recirculating aquaculture systems, process control, hydroponics, and wastewater applications.

pHionics STs Series pH Sensor/Transmitter

The STs Series™

  • Replaceable double junction Ag/AgCl electrode
  • 0.75″ diameter
  • Built-in 0-50°C temperature sensor
  • 316 Stainless Steel and Kynar® housing
  • Replaceable cable

Recommended for remote, long-term monitoring applications and narrow pipe or well measurements.