Deskripsi
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 expands 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.
State-of-the-art fluorescence technology adopted in our design makes the ST-500 series well suited for 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 Lab® ST-500 probe in the presence of iron color.
Details
The ST-500SS-T is offered in 7-pin cable format and should be used with the Pyxis MA-WB 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-500SS-T sensor is a smart device. In addition to measuring fluorescence, the ST-500SS-T sensor has extra photo-electric components. They monitor the color and turbidity of the sample water. This extra feature allows automatic color and turbidity compensation to eliminate interference commonly experienced in real world applications as well as cleanliness diagnostic data.
The ST-500 sensor is offered in a measurement range of 0-500ppb as PTSA and is easy to calibrate using the uPyxis® 2.0 Mobile or Desktop App. Pyxis Lab standard solutions containing PTSA in the range of 100 to 500 ppb can be used. The calibration standard may also be the water sample itself if the PTSA concentration of the sample is measured and validated by an offline fluorometer. This allows the ST-500 sensor to be calibrated online without being removed from the system.
Diagnostic
The uPyxis® 2.0 App also provides diagnostic information about the ST-500 sensor such as sensor cleanliness factor. It is instrumental in determining if the sensor should be cleaned prior to slope calibration. This diagnostic information can also be available via Modbus RTU. For proper calibration, the ST-500 sensor should be diagnosed for cleanliness via the uPyxis 2.0 APP. Then cleaned using the Pyxis Probe Cleaning Kit (SER-01). After cleaning, the sensor cleanliness should be confirmed via the uPyxis 2.0 APP diagnostics function. Then the user may proceed to sensor zero and slope calibration.
High Performance Sensor for Data Center Cooling
The ST- 500 is ideal for data center applications, enhanced coolant, and water quality monitoring. Able to handle critical systems like condenser and technology cooling. Designed for seamless integration, the 24V DC-powered sensors feature low power demand (<1.5W), with built in transmitters. Easy or direct communication with DCS or PLC systems and durable 316L stainless steel construction. Furthermore, the sensor operates under high pressures up to 290 psi. Finally, these features streamline installation, maintenance, and ensure reliable performance in demanding data center environments.
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