In-Line PTSA Fluorometer Probe
- Product Details
- Features
- Specifications
- Cleaning & Calibration
Pyxis ST-500 In-Line Fluorometer Probe
The ST-500 inline fluorometer is a very popular model for real-time monitoring of inhibitor dose with its extreme accuracy and proven robustness in the application of fluorescence traced cooling programs. It is mostly used for feedback control to maintain the dosed concentration within a narrow band around the set point regardless of changes in cycle or heat load dynamics.
Now the ST-500 series expand the target of measurement to a broad range of analytes, including fluorescein and naphthenic disulfonic acid (NDSA) to bring your success of traced cooling programs to boiler and other applications.
Thanks to the state-of-the-art fluorescence technology adopted in our design, the ST-500 series are very forgiven to real world sample water conditions. With its flow-through optical design and multiple wavelength color/turbidity compensation algorithm, the ST-500 probe keeps high performance for water samples with up to 100 NTU turbidity and/or 5ppm iron. The comparison in the experiment shown below clearly demonstrates the superior performance of the Pyxis® ST-500 probe in the presence of iron color.
√ Eliminates Color & Turbidity Interference!
√ ST500 = PTSA (0-300ppb)
√ 4-20mA & Modbus RS485 Connection
√ Wireless Calibration, Smart Phone or Pyxis SP Units
√ Probe fouling diagnostics through PC
Features of the Pyxis ST-500
The ST-500 includes the following features:
- Easy calibration with using uPyxis mobile or desktop app.
- Automatic compensation for turbidity up to 150 NTU and color created by up to 10 ppm iron or equivalent to 10 ppm humic acid.
- Diagnostic information (probe fouling, color or turbidity over range, failure modes) are available in uPyxis app or via CHEMTROL web server.
- The ST-500 probe can be easily removed from the system without the need of any tools for being cleaned.
Pyxis ST-500 Specifications
The Pyxis ST-500 probe uses a narrow wavelength band gallium phosphide photodiode and high temperature-tolerant and humidity-resistant optical filters. This combination greatly enhances the robustness of the probe. It can be operated under a wide range of ambient conditions without the need of humidity and temperature regulation. The performance of the ST-500 probe can be stable and consistent for a long period time.
| Sensor | ST-500 Inline PTSA Sensor |
| PTSA Output Scale | 0-200ppb |
| PTSA Max Range via uPyxis® | 0-300ppb |
| PTSA Precision/Accuracy | ±1ppb |
| Power Supply | 22-26VDC, Power Consumption – 1W |
| Outputs | Isolated 4-20mA Analog & Isolated RS-485 Digital – 7-Pin |
| Installation | ST-001 Inline Tee (PROVIDED), 3/4inch FNPT |
| Weight | 170g (0.37lbs) |
| Operation Pressure | 100psi (6.9Bar) |
| Operation Temperature | 4-49 °C (40-120 °F) |
| Storage Temperature | -20-60 °C (40-120 °F) |
| Material | CPVC |
| Rating | IP67, Dustproof & Waterproof |
| Regulation | CE + RoHS |
| Dimensions | 172.7mm L x 36.6mm D |
| Cable Length | 5ft, Terminated with IP67 Adapter + 1.5ft Flying Lead |
Cleaning & Calibration of the Pyxis ST-500 probe
The Pyxis ST-500 probe has a short fluidic channel. It can be easily cleaned. The fluidic and optical arrangement of the ST-500 probe is designed to overcome shortcomings associated with other fluorometers that have a distal sensor surface or a long, narrow fluidic cell. These fluorometers are susceptible to color and turbidity interference and fouling, and difficult to be cleaned.