NTC thermal sensors
NTC sensors are generally known as thermistors. They are made from materials that conduct electricity better at high temperatures than low temperatures. The electrical resistance decreases with rising temperature and has a negative temperature coefficient.
Thermistors are often used as an alternative to PTCs in the automotive sector. They can even be found in optimised manufacturing processes in aerospace technology, amongst other applications, on account of their high temperature coefficients. NTCs are also used for temperature compensation in electrical circuits. eaw Relaistechnik offers the installation of NTC, PTC, KTY, PT100, PT500 or PT1000 thermistors within our trusted housing range for the ½-inch thermal switch series. With this solution, you have the option to replace traditional bimetallic thermostats with temperature sensors featuring NTC or PTC elements as thermistors immediately without having to change the design of your tools or your construction documentation.
Material and temperature ranges
- Semiconducting materials without impurities, various metal oxides (manganese, nickel, cobalt, iron, copper or titanium) and different alloys
- NTC resistors for wires made of platinum alloy
- Operational temperature range from -80°C to 250°C
Rated value of an NTC sensor (by way of examples) provides its electrical resistance at 25°C.
- NTC 10k -> R = 10 kΩ at 25°C
- NTC 12k -> R = 12 kΩ at 25°C
- NTC 1k8 -> R = 1.8 kΩ at 25°C
Tolerance values of ±1.0 K to ±0.2 K can typically now be achieved in high-volume production processes.