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The ST-525 offers a proprietary design that utilizes LED light sources for the direct measurement of Fluorescein (Fluorescein Sodium Salt/Uranine, CAS# 508-47-8). This simple, smart sensor is perfect for a water treatment professional working in industrial boiler water and process treatment applications.
The ST-525 offers proprietary Pyxis Lab® algorithms to determine the concentrations of Fluorescein at levels as high as 60ppb while simultaneously measuring light loss through the optical channel to determine sensor cleanliness. The ST-525 offers a combination of 4-20mA as well as RS-485 Modbus output signals and is Bluetooth Enabled for wireless cleanliness diagnostics and calibration when used with MA-WB or PowerPACK Series Bluetooth Adapters and the uPyxis APP for Mobile or Desktop devices. The ST-525 Series is provided in CPVC with the standard Pyxis ST-001 inline 3⁄4” FNPT Tee assembly, 5-foot bulk-head cable with quick adapter and 1.5ft flying lead cable with quick adapter, enabling rapid wiring to any microprocessor controller, PLC or DCS system.
| Item | ST-525 Inline Fluorescein Sensor |
| Part Number | 50665 |
| Fluorescein Output Scale | 0-60ppb |
| 4-20mA Span via uPyxis® | 20mA SPAN value may be adjusted to less than max range via uPyxis® |
| Fluorescein Resolution | ±0.2ppb |
| Calibration | Two Point Calibration against DI Water + Fluorescein Calibration Standard |
| 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 | UPVC |
| Rating | IP67, Dustproof & Waterproof |
| Regulation | CE + RoHS |
| Dimensions | 6.8in (172.7mm) L x 1.44in (36.6mm) D |
| Cable Length | 1.5m 7-Pin Bulkhead with Adapter + 1.5m 7-Pin Flying Lead with Adapter |
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