Self-calibrating UV transmittance monitor from Sensorex

The UVT-LED-PW Transmittance Monitor (formerly PearlSense T254) provides continuous monitoring for accurate UV disinfection dosing. The compact monitor delivers fast, accurate, in-line transmittance readings in industrial process and drinking water settings, where UV disinfection is used. Patented automatic wiping and calibration mechanisms significantly reduce maintenance burden and extend service life.

UV Transmittance measurement with the UVT-LED-PW ensures proper UV dosing and efficient operation of UV disinfection systems. Simple to operate, with a clear backlit LED display, the UVT-LED-PW is mounted directly in a pressurized pipe or sampling line, taking automatic measurements every 60 seconds. The sensor directly outputs a 4-20mA signal for UV system control or data logging.

Patented cleaning and calibration features ensure UVT-LED-PW measurements are accurate and reliable. The integrated Teflon wiper delivers a swift cleaning cycle before each reading is taken, to prevent fouling and build-up in water and wastewater applications. The sensor automatically calibrates to a quartz reference standard built into the wiper mechanism. These integrated features, along with highly efficient UV-C LED lamps, reduce maintenance and significantly lower operating expenses related to UVT monitoring and UV disinfection.

The UVT-LED-PW has the smallest footprint of any commercially available UV-transmittance sensor for easy integration in new or existing UV disinfection systems. The UV-C LED light source is more stable than traditional measurement sources, leading to improved accuracy. The IP66-rated unit runs on 24V DC power.

Sensorex also offers the UVT-LED-H Handheld UV Transmittance Monitor. The lightweight, battery operated monitor is ideal for sample measurements in the field, as well as periodic verification of calibration of online UVT analysers.