Chemtrol Australia Product - ST-730SS-T Series Stainless Steel Turbidity Sensors

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ST-730SS-T Series Stainless Steel Turbidity Sensors

  • Product Details
  • Specifications
  • Data Centre Cooling

ST-730SS-T Series Stainless Steel Turbidity Sensors

Removable Inline Turbidity Sensors for High-Pressure Systems

The Pyxis ST-730SS-T series are stainless steel inline turbidity sensors. They slide into the Pyxis ST-009 stainless steel tee or multi-sensor manifold, which take pressures up to 20 bar, and can be removed again without opening the pipework.

Two models are available:

  • ST-730SS-T – 0 to 100 NTU
  • ST-731SS-T – 0 to 10 NTU

Stable Readings, Low Maintenance

The optics measure scattered light at 90° (ISO 7027) through filters that tolerate heat and humidity, so no climate control is needed. The sensors are not easily upset by fouling, particles or air bubbles.

Each sensor gives a 4–20 mA output and RS-485 Modbus. With a Pyxis Bluetooth® adapter, it can be cleaned, checked and calibrated from the uPyxis® app, including calibration against the process water itself, without taking it out of the line.

ST-730SS-T Series Specifications

ItemST-730SS-TST-731SS-T
Part Number5637755995
Range0 – 100 NTU0 – 10 NTU
Resolution0.1 NTU0.05 NTU
Accuracy±2% of reading
MethodNephelometric (NTU), infrared LED, 90° scatter
ComplianceISO 7027
OutputsIsolated 4–20 mA and isolated RS-485 Modbus
Power Supply22 – 26 V DC, 1 W
InstallationPyxis ST-009 stainless steel tee, ¾" FNPT ports (sold separately)
Material316L stainless steel
Dimensions182 mm long, 37 mm diameter
Weight500 g
Operating Pressure20 bar (290 psi) in the ST-009 tee
Operating Temperature4 – 49 °C
Storage Temperature−20 – 60 °C
CalibrationTwo-point, against formazin standards
Cable1.5 m bulkhead cable + 1.5 m flying lead, with adapters
ProtectionIP67, fully dustproof and waterproof
ApprovalsCE, RoHS, UKCA

Ideal for Data Centre Cooling

Pyxis designed the ST-730SS-T for the high-pressure cooling loops that serve AI servers. Turbidity shows suspended particles, corrosion products and biological growth in the coolant, so a change can be acted on before it fouls cold plates or heat exchangers.

With 24 V DC operation, 1 W power consumption, stainless steel construction and direct connection to plant control systems, the sensors suit critical cooling systems.

Key Features

  • Two ranges: 0–100 NTU and 0–10 NTU
  • Resolution down to 0.05 NTU
  • Accuracy ±2% of reading
  • Stainless steel body, removable from its tee
  • Up to 20 bar (290 psi) in the ST-009 tee
  • Infrared 90° scatter optics, to ISO 7027
  • Tolerant of fouling, particles and air bubbles
  • Isolated 4–20 mA and RS-485 Modbus
  • Two-point calibration with formazin standards, or against the process water
  • Wireless cleaning and calibration via the uPyxis® app with a Bluetooth® adapter
  • IP67 rated