Description
The Pyxis ST-525SS-T series of sensors are a new 304 stainless steel design allowing insertion and removal of the sensor into the Pyxis ST-001 (CPVC) or ST-007 (Stainless Steel) inline tee assemblies. These sensors use temperature tolerant and humidity-resistant optical filters. They can be operated under a wide range of ambient conditions without the need of humidity and temperature regulation. With this design the performance of the ST-525SS-T series can remain stable and consistent for an extended period time.
The Pyxis ST-525SS-T series sensor measures the concentration of fluorescein in water. Commonly used as a fluorescent tracer in water treatment applications. The sensor platform is offered in 304- stainless steel body for applications of monitoring boiler feed water or boiler blowdown after being properly cooled to near the ambient temperature. The new design allows for easy sensor removal for sensor diagnostics, cleaning, and calibration. Designed for application pressures as high as 300psi however water sample temperatures must be pre-cooled to at or below 120 ºF.
The ST-525SS-T series is offered in 8-pin cable format and should be used with the Pyxis MA-CR Bluetooth/ USB adapter for those desiring to use the uPyxis 2.0 Mobile or Desktop App. The 4–20mA current output from the sensor may be connected to any controller that accepts an isolated or non isolated 4–20mA input. The ST-525SS-T series sensor is a smart device. The ST-525SS-T series sensor has extra photo electric components that monitor the color and turbidity of the sample water. This extra feature allows automatic color and turbidity compensation. Eliminating interference commonly experienced in real-world applications as well as cleanliness diagnostic data.
Details
The ST-525SS-T series of sensor are offered in two detection range formats. For standard applications such as boiler feedwater, the 0-60ppb range of sensor is recommended. For high range applications such as boiler blowdown, the 0- 500ppb sensor labeled as HR is recommended. Both format ranges are easy to calibrate using the uPyxis® 2.0 Mobile or Desktop App. Pyxis Lab calibration standard solutions containing Fluorescein in the range of 10 to 60 ppb for standard range sensors or 250-500 ppb for high range sensors can be used for the calibration of the ST-525SS-T series. The calibration standard may also be the water sample itself.
If the Fluorescein concentration of the sample is measured and validated by a calibrated offline fluorometer. This allows the ST-525SS-T series sensor to be calibrated online without being removed from the system. The uPyxis® 2.0 App also provides diagnostic information about the ST-525SS-T. Such as sensor fouling, color or turbidity over range, failure modes, etc. This diagnostic information can also be available via Modbus RTU. The ST-525SS-T series sensor should be diagnosed for cleanliness via the uPyxis 2.0 APP. Once cleaned, sensor cleanliness should be confirmed via the uPyxis 2.0 APP diagnostics function.
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