1.For precision temperature sensing, nothing beats a Platinum RTD. Resistance temperature detectors (RTDS) are temperature sensors that contain a resistor that changes resistance value as its temperature changes, basically a kind of thermistor.

2.The MAX31865 handles all of your RTD needs, and can even compensate 3 or 4 wire RTDS for better accuracy. Connect to it with any micro controller over SPI and read out the resistance ratio from the internal ADC. We put a 430Ω 0.1% resistor as a reference resistor on the breakout.

3.Each order comes with one assembled RTD amplifier breakout board. Also comes with two 2-pin terminal blocks (for connecting to the RTD sensor) and pin header (to plug into any breadboard or paperboard).