The Vokera wet sensor thermistor is designed for use in Compact, Linea, Mynute EHE, Syntesi, Mynute, Sabre, Rain, AquaNova, Synergy, Option, Excell and Elidra boilers. It is supplied with a washer for fitting. The sensor is employed to increase circuit resistance in line with temperature drops. A boiler's printed control board sends a current to the thermistor, deciding whether a decrease or increase in heat is required by reading the relative resistance.

• Wet sensor
• Screws into the pipe
• Comes with washer