Adafruit PT100 RTD Temperature Sensor Amplifier - MAX31865

For precision temperature sensing, Platinum RTDs excel. These sensors contain a platinum resistor, precisely a PT100, which offers 100 ohms at 0°C, known for their superior stability and reliability compared to thermistors.

The Adafruit RTD Sensor Amplifier with the MAX31865 breakout ensures optimal performance from your PT100 RTDs. Compatible with 2, 3, or 4-wire configurations, it compensates for connecting wire resistance, enhancing accuracy. The onboard 430Ω 0.1% reference resistor provides benchmark precision.

Interface effortlessly with any microcontroller via SPI to obtain resistance ratio data from the internal ADC. Designed with a 3.3V regulator and level shifting, it supports 5V devices, making it versatile for various projects. The package includes an assembled breakout board, terminal blocks, and headers, requiring minimal soldering.

While the PT100 RTD sensor is sold separately, this breakout maximizes its capabilities, backed by example code to simplify resistance-to-temperature calculations, making high-precision applications achievable.