What Is Pt500 Temperature Sensor?

Pt500 RTD sensors are a rare type of platinum resistance thermometer. Pt refers to that the sensor is made from Platinum (Pt). 500 refers to that at 0°C sensor has a resistance of 500 ohms (Ω).

RTDs like the PT500 are typically made of platinum because of its stable and predictable resistance-temperature characteristics. As temperature changes, the resistance of the RTD changes in a predictable manner, allowing for accurate temperature measurement.

See definition: Resistance thermometer