RTD click is based on MAX31865 resistance to digital converter from Maxim Integrated, optimized for platinum resistance temperature detectors, or RTD. The click uses the PT100 type platinum probe for temperature measurement. There are four screw terminals on the board, so different PT100 probe types can be used with this design. This click board™ can work with 2, 3 or 4-wire PT100 probe types.

RTD probes are commonly used to measure a range of temperatures between -200°C and 500°C, but the exact value depends on the specific probes used. Features like the 15bit ADC resolution, input terminals overvoltage protection up to ±45V, fault detection, fast response time of 21mS and the SPI interface, make the RTD click an ideal solution when it comes to precise measuring of extremely high and low temperatures.