Skip to main content

Autoflo Technology

Pyxis ST-500SS Inline Stainless Steel High Pressure PTSA Sensor

Stainless steel high-pressure inline PTSA sensor (0-200ppb). 4-20mA + RS-485, 7-pin.

Pyxis
PTSA Fluorometer
Inline Sensors Line

Pyxis ST-500SS Inline Stainless Steel High Pressure PTSA Sensor

Model:
ST-500SS
Brand:
Pyxis

The Pyxis ST-500SS is an inline PTSA fluorometer built with a stainless steel body for high-pressure service, used to track inhibitor dose in fluorescence-traced water treatment programmes. It measures PTSA tracer concentration across a 0-200ppb range and outputs via 4-20mA analog and RS-485 Modbus through a 7-pin connector.

High-pressure durability — stainless steel body rated for high-pressure inline service
Fluorescence-based tracking — measures PTSA tracer concentration from 0-200ppb to monitor inhibitor dosing accuracy
High-pressure durability — stainless steel body rated for high-pressure inline service

Description

The Pyxis ST-500SS is an inline PTSA fluorometer built with a stainless steel body for high-pressure service, used to track inhibitor dose in fluorescence-traced water treatment programmes.

It measures PTSA tracer concentration across a 0-200ppb range, giving operators a direct, real-time read on whether treatment chemical dosing is holding at target concentration.

Output is via 4-20mA analog and RS-485 Modbus through a 7-pin connector, supporting integration into plant control systems where the sensor will be exposed to elevated line pressure.

Why Use This

Built for High-Pressure Service

A stainless steel body allows this sensor to be used in high-pressure inline installations where a plastic-bodied unit would not be suitable.

Real-Time Inhibitor Tracking

Continuous PTSA fluorescence measurement across a 0-200ppb range gives an accurate read on inhibitor dosing in fluorescence-traced programmes.

Simple Control Integration

4-20mA analog and RS-485 Modbus outputs through a 7-pin connector allow straightforward wiring into a PLC or SCADA system.

Applications

  • High-pressure cooling and process water lines — stainless steel body rated for elevated line pressure
  • Inhibitor dose tracking in fluorescence-traced treatment programmes
  • PLC/SCADA-integrated dosing verification via 4-20mA and Modbus outputs

FAQ

Why choose the stainless steel version over a standard PTSA sensor?

The ST-500SS has a stainless steel body specifically built for high-pressure inline service, making it suited to installations where line pressure exceeds what a standard sensor body is rated for.

What is the measurement range?

It measures PTSA tracer concentration across a 0-200ppb range.

How does it output data to a control system?

Output is via 4-20mA analog and RS-485 Modbus through a 7-pin connector.

Does this sensor include the tee assembly?

The description does not specify a no-tee configuration for this model, distinguishing it from the ST-500-NT variant sold sensor-only.

Download

D25 Product Datasheet
PDF · 1.2 MB
Installation Manual
PDF · 0.8 MB

Resources

How to Size a Chemical Dosing Pump for Water Treatment
Technical Article · 8 min read
Understanding Water-Powered vs Electric Dosing Pumps
Technical Article · 6 min read
Poultry Medication Dosing — Case Study
Case Study · Selangor Poultry Farm
You May Also Need

Related Products

Pyxis ST-765SS-O3 Ozone + pH Sensor – Sensor Only (Stainless Steel)

Stainless steel ozone + pH sensor, 0-2ppm, sensor only with no flow reservoir. Dual 4-20mA + RS-485, 8-pin connector.

Pyxis RT-100 PRISM Inline Refractometer

Inline digital refractometer measuring refractive index, %BRIX, and both mono-ethylene and mono-propylene glycol concentration in one sensor. Suited to closed-loop glycol systems, sugar process monitoring, and data centre cooling loops.

Controllers
Pyxis pH / ORP Controller

Compact dual-channel controller for pH and ORP monitoring with direct pulse output to dosing pumps.

Accessories
Injection Quill & Check Valve

PVDF injection quill with integral non-return valve for safe chemical injection into pressurised pipelines.

Animal Line

Other Models in This Line

Pyxis ST-500SS Inline Stainless Steel High Pressure PTSA Sensor
Explore Range
Stay Informed

Latest Resources

Initiate a Project

Need help with selection or sizing?

Our engineers are ready to evaluate your requirements and recommend the right solution.