Thermocouple is a sensor used to measure temperature. Thermocouples consist of two wire legs made from different metals. The wires legs are welded together at one end, one junction is placed where the temperature is to be measured, and the other is kept at a constant lower temperature. When the junction experiences a change in temperature, a voltage is created. Thermocouple
Thermocouple Range:
Pt- 100 Sensor
A Pt100 is a sensor used to measure temperature. It is one type of sensor which falls into a group called Resistance Temperature Detectors or RTD’s.
Pt100 thermocouples are a misnomer of two separate types of temperature sensor, a Pt100 resistance thermometer and a thermocouple. Pt100s and thermocouples are two very different technologies both used to measure temperature. A temperature sensor can be one or the other, a sensor cannot be both. It can often be hard to tell if you have a Pt100 or a Thermocouple in front of you if you are not a specialist. Instrumentation can often confused things further. If an instrument accepts both Pt100 and thermocouple input, it might be confusingly labelled as Pt100 / Thermocouple. RTD temperature bulb/thin film sensors are resistance of a metal changes at a fixed rate according to temperature changes. The resistance bulb/thin film uses this property to measure temperature cover a wide operating temperature range of -200 °C to +650 °C.
Thermocouple Application: