Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Sensor Type | RTD (Resistance Temperature Detector) |
| Supported Elements | PT100, PT1000 |
| Interface Protocol | SPI |
| Operating Voltage | 3.0V to 3.6V |
| Temperature Range | -200°C to +850°C |
| Resolution | 0.25°C |
| Accuracy | ±0.5% typical |
| Fault Detection | Open/Short Circuit Alert |
| Package Type | Breakout Board with Header Pins |
| Compatibility | Arduino, Raspberry Pi, ESP32 |
Anonymous
Mar 27, 2026
Rating: 5/5
Easy to use with Arduino libraries
As a beginner, I was worried about the complexity of RTDs, but the available libraries made integration simple. The code examples worked out of the box, and I got reading within minutes.
Anonymous
Mar 26, 2026
Rating: 5/5
Stable readings for soil monitoring
Using this with a PT100 probe to monitor soil temperature in my greenhouse. It has been running 24/7 for two months without drift or issues. The build quality feels solid.
Anonymous
Mar 17, 2026
Rating: 5/5
Reliable for engine bay temps
I used this to monitor exhaust gas temperatures in my project car. It handles the heat well and the fault detection feature saved me when a wire loosened. Very robust little board.
Anonymous
Mar 17, 2026
Rating: 5/5
Perfect for industrial monitoring projects
This MAX31865 module works flawlessly with my Raspberry Pi setup. The SPI communication is stable, and the temperature readings are consistent when compared to our calibrated lab equipment. Highly recommended for precision tasks.
Anonymous
Mar 15, 2026
Rating: 4/5
Great sensor, minor wiring confusion
The module itself is excellent and provides accurate data. I deducted one star because the pinout diagram on the back was slightly faded, making initial wiring a bit tricky. Once connected, it performed perfectly.
Anonymous
Mar 02, 2026
Rating: 4/5
Good value for the price
We bought five of these for a university lab experiment. They offer good accuracy for the cost, though they require careful calibration if you need extreme precision at the lower end of the temperature scale.
Q: Does this module support both 2-wire and 4-wire RTD configurations?
A: Yes, the MAX31865 breakout supports both 2-wire, 3-wire, and 4-wire RTD configurations. You simply need to adjust the jumper settings and update the configuration register in your code accordingly.
Q: What is the maximum length for the sensor wires before signal degradation occurs?
A: While it depends on the environment and shielding, we generally recommend keeping lead wires under 15 meters for optimal noise immunity. Using twisted pair shielded cables is advised for longer distances.
Q: Is a separate power supply needed for the RTD element?
A: No, the module provides the necessary excitation current for the RTD element directly from the board. You only need to provide VCC and GND to the module itself.
Q: Does the package include the PT100 probe or just the circuit board?
A: This listing includes only the MAX31865 breakout board. The PT100 or PT1000 resistance probe must be purchased separately based on your specific application requirements.
Q: Can I connect multiple modules to a single microcontroller?
A: Absolutely. Since the module uses the SPI interface, you can daisy-chain or individually select multiple modules by connecting each to a unique Chip Select (CS) pin on your microcontroller.
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