PT100 sensor

The measurement of temperature using resistance thermometers is based on the characteristic, common to all the conductors and semiconductors, to change its electrical resistance as the temperature changes. The PT100 sensor has an ohmic value of 100 at a temperature of 0 ° C and its coefficient of variation is of 0.00385 ohms per ° C. The right technology to meet today's requirements for more precise measurements involves the use of thin layers of platinum on a ceramic substrate (thin-film resistors).