{"title":"Adafruit PT100 RTD Temperature Sensor Amplifier - MAX31865","handle":"adafruit-pt100-rtd-temperature-sensor-amplifier-max31865","url":"/products/adafruit-pt100-rtd-temperature-sensor-amplifier-max31865","description":"The Adafruit PT100 RTD Temperature Sensor Amplifier is a breakout board for the MAX31865 precision RTD-to-digital converter. It reads 2-, 3-, or 4-wire PT100 platinum resistance temperature detectors over SPI, delivering laboratory-grade temperature accuracy and repeatability that surpasses thermocouples.\n\nPT100 RTDs use a platinum resistor element (100Ω at 0°C) whose resistance changes predictably with temperature. The MAX31865 handles signal amplification, wire compensation, and analogue-to-digital conversion — you simply read the resistance ratio over SPI and convert to temperature. The board includes a 430Ω 0.1% precision reference resistor and is 5V-safe with an on-board 3.3V regulator and level shifting.\n\nKey Features\n\n\nMAX31865 RTD Amplifier – Precision ADC with automatic wire resistance compensation\n\n2-, 3-, or 4-Wire RTD Support – Compatible with any PT100 (100Ω at 0°C) sensor\n\n430Ω 0.1% Reference Resistor – Pre-installed for PT100 sensors\n\nSPI Interface – Works with any microcontroller; example code provided for temperature calculation\n\n5V Safe – On-board 3.3V regulator and level shifting for use with Arduino and other 5V boards\n\nScrew Terminal Blocks – Two 2-pin terminals for connecting RTD sensor wires\n\n\nPT100 vs PT1000\nThis board is configured for PT100 RTDs (100Ω at 0°C). If you have a PT1000 RTD (1,000Ω at 0°C), a different version with the appropriate reference resistor is available.\n\nIdeal For\n\nPrecision temperature measurement in laboratory settings\nIndustrial process monitoring and control\nFood and beverage temperature logging\nScientific instruments requiring high accuracy and repeatability\n\n\nPackage Contents\n\n1× Adafruit MAX31865 RTD Amplifier Breakout (assembled)\n2× 2-pin screw terminal blocks (colour may vary)\n1× Header strip (requires soldering for breadboard use)\n\n\n\nImportant: PT100 RTD sensor is not included and must be purchased separately.\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":12572,"title":"Default Title","sku":"AF-3328","price":31.31,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":3,"option1":"Default Title"}]}