RTD/PT100 sensor used to measure temperature
Resistance thermometer or PT100 sensor, also called resistance temperature detectors (‘RTD’), are used when measuring temperatures by checking the resistance of the RTD element with temperature. Most RTD sensors are made up of a length of fine coiled wire wrapped around a ceramic or glass core which is placed inside a sheathed probe to protect it. The RTD element is made from a pure material, typically platinum, nickel or copper. The material has a predictable change in resistance as the temperature changes; it is this predictable change that is used to determine temperature.
They are generally more accurate than thermocouples up to 10 times more and are made from two or three wires depending on the accuracy requirement.
As well as the standard stocks sizes here we can easily make you a sensor to your specific requirement.