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Pyxis ST-712 pH/Orp Sensor with Embedded Transducers

USA Toll Free: 1-800-730-0302 Tel: 416-240-1920 -

The Pyxis ST-700 series of pH, ORP, and conductivity probes are designed to simplify installation, calibration, and in-use operation in industrial wastewater and cooling water applications. These probes have an embedded 4~20mA transmitter.

The oversized platinum disk ORP and the flat pH bubble sensing elements increase resistance to contamination. The double salt bridge design with large junction capacity ensures a long sensor life with minimum maintenance.

Typical Applications

Industrial wastewater treatment, cooling water treatment


Dual embedded transmitters in sensor housing: 4-20mA and RS-485 supporting MODBUS.
Large conjunction capacity (compared to replaceable electrode design) leading to longer service life.
Longer maintenance cycles with high contamination resistance.
Eliminates the need of pre-amplifier and transfer signal directly in 4~20mA or digital protocol.
Enhanced robustness when controller is away from sample point.
Specially designed pH/ORP electrodes tolerant to short time frozen during shipment or storage.
Stainless steel solution grounding point on sensor to stay away from ground loop problems.

ST 712 Series pH & ORP Probe

ST712 = pH/ORP Dual Probe

4-20mA & Modbus RS485 Connection

Modbus Connection = Digital Advantage!

Very Long Sensor Life – 2+ Years & 1 Year Warranty

Quick Change Out Connection – No Electrodes to Swap

Wireless Calibration Smart Phone or Pyxis SP Units

Probe fouling diagnostics through PC

Enlarged Salt Bridge = Reduced Fouling Characteristics

3-4x KCl Gel Content Over Conventional Probes

Ideal For Cooling & Wastewater Applications!

ST-712 Quick Start Guide

ST-712 Data Sheet


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Metex Corporation Limited has been providing superior products and services to the process control, chemical treatment, waste water, industrial and manufacturing industries for over 25 years. It is our goal to continually provide our customers with the best possible equipment, technology, and service.


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