The Pyxis ST-500 Series Inline Fluorometers are very popular models for real-time monitoring of inhibitor doses with their extreme accuracy and proven robustness in the application of fluorescence traced cooling programs. They are 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.

The ST-500 series expands the target of measurements 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. Three models are available: ST-500 (0-200ppb PTSA, CPVC, 100psi), ST-500RO (0-40ppb PTSA, CPVC, 100psi), and ST-500SS (0-200ppb PTSA, 304 SST, 290psi). All models feature ±1% accuracy, two-point calibration, Bluetooth communication, 5ft cable with IP67 connectors, and 3/4in NPT panel mount installation.

Typical applications include cooling tower inhibitor control, boiler water chemical monitoring, and closed-loop system tracer studies.