For precision temperature sensing, nothing beats a Platinum RTD (Resistance Temperature Detector). RTDs are temperature sensors that feature a resistor whose resistance changes with temperature, similar to thermistors but with much greater stability and accuracy.
This particular RTD is a PT1000, meaning it uses a Platinum resistor with a 1000-ohm resistance at 0°C. It's perfect for applications where high-accuracy temperature measurements are required, and you can also use this sensor to measure resistors with around 1K ohm resistance (with a range from half to double that value).
Unlike NTC/PTC thermistors, PT RTDs are more stable, precise, and have a longer lifespan, making them ideal for laboratory and industrial applications. PT1000 sensors are known for their superior accuracy, repeatability, and stability—qualities that thermocouples can’t match.
To get the best performance from your PT1000 RTD, you need an amplifier designed to read its low resistance. The Adafruit MAX31865 RTD Sensor Amplifier breakout is the perfect solution, as it can be used with 2, 3, or 4-wire PT1000 RTDs. The MAX31865 is specifically designed to handle RTD needs and compensates for resistance in connecting wires to improve accuracy.
The MAX31865 is equipped with a 4300Ω reference resistor, and when connected to a microcontroller via SPI, it reads the resistance ratio and calculates the temperature. We provide example code to help you get started quickly. The breakout is 5V compliant with a 3.3V regulator and level shifting, making it compatible with Arduino or other microcontrollers.
What's Included:
Please note that a PT1000 RTD is not included (but can be purchased separately in our shop). Some soldering is required to attach the headers and terminal blocks to the breakout, but it’s a simple task with soldering tools.
Technical Details:
Product Dimensions: 28.0mm x 25.0mm x 2.4mm / 1.1" x 1.0" x 0.1"
Product Weight: 2.6g / 0.1oz