The platinum thin film RTD sensor consists of a structured thin film of platinum coated onto a ceramic substrate, passivated by a glass coating. The most common types of platinum thin film RTD sensors are the Pt100 and the Pt1000. The Pt100 has a base resistance value of 100Ω at 0°C (ice point), and the Pt1000 has a base resistance value of 1000Ω at 0°C. The most common temperature coefficient of resistance (TCR) for these sensors is 3850 ppm/K, meaning a change in resistance of 38.5 Ohms between 0°C and 100°C for the Pt100. Both the Pt100 and the Pt1000 are available in a range of temperature accuracies and dimensions.
Applications
RTD sensor elements are especially suitable for applications that require a higher operating temperature range than thermistors, require good accuracy over a wide range of temperatures or applications that require good stability and low drift over time. Featured applications include:
