TDK B59607A0120A062 PTC Temperature sensor -40 up to +125 °C 55 Ω

Max. operating voltage: 30 V AC, 30 V DC; Model (sensors): PTC; Resistance: 55 Ω; Temperature reading range (max.): +125 °C; Temperature reading range (min.): -40 °C

Price: £ 1.29 from Conrad Electronic