Pyxis PTSA & turbidity sensors

Pyxis ST-588

The industry’s most reliable PTSA sensor…with a twist. Measures for PTSA and turbidity while compensating for colour & turbidity interference

The Pyxis ST-587 Series inline fluorometer & turbidimeter measure the concentration of PTSA and turbidity in water. They utilise both LED UV and warm white light sources. PTSA is commonly used as a fluorescent tracer in cooling and process water treatment. This unique Pyxis sensor platform is offered in both UPVC and 304 stainless steel material depending on application pressures. The SS (stainless steel) version of the sensor platform is ideally suited for high pressure water systems. While the UPVC version of the sensor platform are better suited for application pressures below (100psi / 6.9 Bar).


The ST-587 series sensors can be connected to any device that accepts an isolated or non-isolated 4–20mA input or RS-485 MODBUS input. The ST-587 sensor has extra photo-electric components that measure the colour and turbidity of the sample water. This extra feature allows automatic colour and turbidity compensation to eliminate interference commonly experienced in real world applications. As well as in-situ sensor cleanliness diagnostic data. The ST-587 Series sensors have a short fluidic channel, are very easy to clean and are uniquely designed to overcome issues associated with other fluorometers that have a distal (flat) sensor surface or a long, narrow fluidic cell.


Product Range:

ST-587: CPVC
Low cost CPCC contacting sensor
ST-587SS: Steel
Toroidal non-contacting PEEK sensor
ST-100: Tee
Low cost CPCC contacting sensor
100 psi
ST-001 tee inc
290 psi
3/4" thread

Typical applications

Built for industrial cooling water and process treatment applications.

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