UV intensity sensor, part 170001-0001-06, for Hanovia medium-pressure ultraviolet disinfection systems. The sensor measures UV intensity inside the treatment chamber and provides the signal the controller uses for dose monitoring and low-dose alarms. Note the suffix: Hanovia builds several variants in the 170001-0001 family and the final two digits identify the variant, so -06 and -03 are not interchangeable. Order against the number on the sensor body or on your system parts list. Reference number 2259-0508.