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Pyxis ST-720 Inline Conductivity Sensor

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 720 – Inline Conductivity Sensor

ST720 = Conductivity (0-15,000uS)

32-104F Operation

4-20mA & Modbus RS485 Connection

Modbus Connection = Digital Advantage!

Long Sensor Life – 2 years + & 1-Year Warranty

4 Electrodes

Transducer Inside Probe = True 4-20mA Output

Minimal Maintenance

Wireless Calibration Smart Phone or Pyxis SP Units

Probe fouling diagnostics through PC

Ideal For Cooling & Wastewater Applications!


ST-720 Quick Start Guide

ST-720 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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