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Pyxis ST-600 / ST-601 Disinfection Probes

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ST-600 / ST-601 Disinfection Probes

The Pyxis ST-600 inline probe measures the concentration of bleach (sodium hypochlorite). The ST600 probe measures the optical density of the beach solution using a near UV light. The probe has a built-in reference light source and a reference light detector in addition to the main light source and main light detector. The wet part of the probe is a 6-inch long, 7 mm OD Teflon tubing. This configuration ensures long-term stable measurement of the bleach concentration. The ST-600 probe can be connected to any device that accepts an isolated or non-isolated 4-20mA input. Other features of the Pyxis ST-600 probe include:

• The probe can be conveniently connected to the suction or discharge side of the bleach pump tubing with using a union or a quick push-in connector.

• The ST-600 can be calibrated with a PC or smart phone app via a Bluetooth/Wifi adaptor.

• Diagnostic information (probe tubing fouling and failure modes) can be communicated to digital displays via Modbus RTU.

Eliminates Color & Turbidity Interference!

ST600 = % Concentration of Bleach (0-16%)

ST601 = % ClO2 (0-0.35%)

Realtime Measurement

Oxidizer Control Systems

Measure Bleach Strength Accurately

Measure ClO2 Strength Accurately

No Reagents!

4-20mA & Modbus RS485 Connection

Wireless CalibrationSmart Phone or Pyxis SP Units

6 Month Calibration Cycle

Online Algae Detection Technology

Eliminates Color & Turbidity Interference!

EM 500 – Online Chlorophyll-a Detection

EM 400 – Handheld Chlorophyll-a Detection

EM 900 – Handheld Chlorophyll-a + Colorimeter

Measures Living Chlorophyll-a

Ideal For Algae Dynamic Measurement of System

For Alarming or Algaecide Dosing Automation

No Reagents!

4-20mA & Modbus RS485 Connection

Wireless CalibrationSmart Phone or Pyxis SP Units

Probe fouling diagnostics through PC

ST-600 Data Sheet

ST-600 Operation Manual

ST-601 Operation Manual


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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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