Pyxis turbidity sensors

Pyxis ST-730

Robust turbidity sensor series with a high tolerance to fouling, particulate and air bubble challenges

The ST-730 is an inline turbidimeter designed for a wide range of turbidity monitoring in various applications. Each device is configured with a specific scale for NTU detection, ranging from 1–100NTU. This sensor is more robust and tolerant to fouling, rendering alternative turbidity sensors inferior due to particulate and air bubble challenges. The ST-730 also offers desired resolution and accuracy in high turbidity applications commonly using suspended solid meters.


  • InfraRed LED light source with 90º scattering
  • Accurate readings in complex flow systems
  • Compact design with small footprint
  • Integrated 4–20mA + RS-485 Modbus outputs
  • Bluetooth® enabled when used with the MA-WB or PowerPACK Bluetooth® adapters
  • Wireless diagnostics & calibration via uPyxis® mobile or desktop App

Installation & callibration

The ST-730 series offers a combination of 4–20mA as well as RS-485 Modbus output signals. They are Bluetooth® 5.0 enabled for wireless cleaning & calibration when used with the MA-WB or Power-PACK series of Bluetooth® adapters & the uPyxis® app.

The ST-730 Series is provided in CPVC with the standard ST-001 inline 3/4inch FNPT tee assembly, 1.5m bulk-head cable with quick adapter, and a 1.5m flying lead cable with quick adapter for rapid wiring to any microprocessor, PLC or DCS system.
A 304L stainless steel option is offered with 3/4inch FNPT ports for high pressure applications.


Key information

ModelRange (NTU)ResolutionAccuracyLight source
0.1 NTU
White <100
infrared >100
0.05 NTU
10 NTU
White <100
Infrared >100
0.1 NTU

Typical applications

  • Industrial process water
  • Fresh, brackish, sea water
  • Cooling water
  • Raw, influent water
  • Wastewater effluent
  • Surface water
  • Storm water



Custom build solutions

Redefine simplicity and flexibility in cooling tower solutions with our plug-and-play service that delivers rapid installation.

We offer standard layout that serves as a solid foundation but we can be customise to meet the unique needs of any client site. We tailor the build to achieve optimal performance.

Our custom builds are popular as a comprehensive solution that's wired and seamlessly integrated meeting any site requirements. Email us today to learn more about our bespoke custom built solutions to speed up your installation and reduce operation or project downtime.


We specialise in delivering tailored product training to empower your team and enhance operational efficiency. Whether you prefer on-site sessions, at your company's location or the convenience of video conferencing, we've got you covered.

Our focus revolves around installation best practices, ensuring seamless product connectivity, and optimising maintenance procedures. Take the first step towards maximising your team's potential. Email us today to learn more about our bespoke training offerings, check availability, and embark on a journey to enhance your team's expertise.

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Sensys Ltd

Head Office
24 Vision Park
Preston Place
Upper Caldecote
SG18 9GQ

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01438 759 595

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