RTD temperature sensors are passive elements composed of a resistor which resistance changes as the temperature changes. The famous PT100 is a resistor made of platinum with a resistance of 100 Ohm at 0°C, hence the name. The 3-wires construction is the most common design, found in industrial process and monitoring applications. The third wire provides a method for removing the lead wire resistance from the sensor measurement and improve accuracy. In order to get usable data, the raw signals from the RTD need to be processed by specialist chips such as the MAX31865.
- Temperature range from 0 to 200°C
- Good accuracy (better than thermocouples)
- Long-term stability
- Liquid temperature measurement
- Air conditioning
- Temperature control
PT100 datasheet (part number 79696035)