Resistance temperature detector module MAX31865 for RTD PT100

For accurate temperature measurement, nothing beats a platinum sensor. Resistive temperature sensors (RTDs) are temperature sensors that contain a resistor - the resistance value changes as the temperature changes. In the PT100 sensor, the resistor is a small strip of platinum with a resistance of 100 ohms at 0 °C, hence the name PT100. Compared to most NTC/PTC thermistors, PT type thermistors are much more stable and accurate. The PT100 has been used for years for temperature measurement in laboratories and industrial processes because of its accuracy (better than thermocouples) and stability.
However, to achieve this accuracy from a PT100 sensor, you must use an amplifier for low resistance readings. Even better is to use an amplifier that can automatically adjust and compensate for the resistance of the connecting wires. Therefore, the MAX31865 transmitter temperature sensor module is designed to be used with any 2-, 3-, or 4-wire PT100 RTD sensor.
The MAX31865 meets all thermometer requirements and can even compensate for the wiring resistance of 3 or 4 wire sensors for improved accuracy. Connect any microcontroller to it via SPI and read the resistance ratio from the internal ADC. A 430Ω 0.1% resistor is used as a reference.
5V compatible wiring with a 3.3V regulator and level shift allows you to use the module with any Arduino or other microcontroller.

Additional connectors are included. The required PT100 temperature measurement sensor is not included in the kit - it can be purchased additionally (item code CJJ0078).