Passieve temperatuursensoren

Unlike temperature transmitters, temperature sensors are passive and do not require a direct power supply. There are several types of temperature sensors, most of which operate on the thermocouple principle, or variable resistance. Thermocouples consist of two different metals connected together on the measurement side and on the reference side, creating a voltage that changes as the temperature changes. The most well-known resistance thermocouples are the PT100 and the PT1000, where the resistance increases as the temperature increases. There are also lesser-known resistance-temperature sensors such as the NTC and PTC.