Atc semitec 103atc3 s184 10k 1 8 ni plated brass temperature sensor atc semitec 103atc3 3p s184 a screw fit temperature sensor that is designed to fit into the 1 8 bspg parallel thread tapped hole of a heating appliance the sensor has a oslash 5mm nickel plated brass probe and wide temperature range and is suitable for use with gas boilers heating and air conditioning systems instant water heaters and compressors atc semitec 103atc3 3p s184 10k m15 ni plated brass temperature sensor