Temperature sensor cable, 10 metres, for Hanovia medium-pressure ultraviolet disinfection systems. It carries the chamber temperature signal to the controller — the input the system uses to protect against overheating when flow stops with a lamp still lit, which is the condition that cracks a quartz sleeve. Please note that this reference has been superseded: item 22185 is the current replacement and is the one to order for a new installation. The matching temperature sensor has been superseded in the same way, by item 22186. Reference number 2258-0508.