7Semi PT100 RTD 3-Wire Temperature Sensor Amplifier Breakout Board - MAX31865

The 7Semi PT100 RTD 3-Wire Temperature Sensor Amplifier Breakout Board is designed for precise and reliable temperature monitoring using 3-wire PT100 resistance temperature detectors (RTDs). Powered by the MAX31865 RTD-to-digital converter, the board measures changes in PT100 sensor resistance and converts them into digital data for temperature calculation. Its 3-wire configuration helps compensate for lead-wire resistance, improving measurement accuracy compared to conventional 2-wire connections. With SPI communication and support for 3.3V or 5V power input, the module integrates easily with Arduino, ESP32, Raspberry Pi, STM32, and other microcontrollers. It is ideal for industrial temperature monitoring, laboratory equipment, heating systems, and precision measurement applications.

Key Features

• MAX31865 RTD-to-Digital Converter: Features the MAX31865 IC for precise PT100 resistance measurement and reliable digital temperature monitoring.

• 3-Wire PT100 Compatibility: Specifically designed for 3-wire PT100 RTD probes, providing improved measurement accuracy in industrial and embedded applications.

• Lead Resistance Compensation: Reduces temperature measurement errors caused by connecting wires, particularly when the lead-wire resistances are closely matched.

• High-Resolution Measurement: Incorporates a 15-bit ADC for detailed resistance measurements, supporting precise temperature monitoring and control.

• SPI Communication Interface: Enables easy integration with Arduino, ESP32, Raspberry Pi, STM32, and other SPI-compatible microcontrollers.

• Flexible Power Supply: Supports 3.3V or 5V power input, allowing compatibility with a wide range of development boards and embedded systems.

• Built-in Fault Detection: Detects RTD disconnections, short circuits, and electrical fault conditions to improve monitoring reliability.

• Noise Filtering: Provides selectable 50Hz and 60Hz filtering to help minimize interference from electrical power systems.