MAX31865 RTD Converter Module PT100 PT1000 Temperature Sensor SPI

🔧 MAX31865 RTD Converter Module | AuscomTech

This MAX31865 module is a precision RTD converter designed for platinum resistance temperature sensors.

It converts low-resistance RTD signals into accurate digital temperature data via an SPI interface.

Perfect for PT100 and PT1000 temperature measurement in industrial, laboratory, and microcontroller-based systems.

⭐ Key Features

• RTD Sensor Compatibility – supports PT100 to PT1000 platinum resistance sensors
• 2, 3 & 4-Wire Support – flexible wiring options for improved measurement accuracy
• SPI Digital Interface – easy integration with Arduino, ESP32, Raspberry Pi, STM32
• High Resolution ADC – 15-bit conversion for precise temperature readings
• Integrated Fault Detection – identifies open circuit, short circuit, and fault conditions
• 3.3V / 5V Compatible – onboard regulation and level shifting for broad compatibility

📊 Technical Specifications

• Chipset: MAX31865
• Sensor Type: Platinum RTD
• Supported Sensors: PT100 / PT1000
• Wiring Modes: 2-wire, 3-wire, 4-wire
• Interface: SPI
• ADC Resolution: 15-bit
• Temperature Resolution: 0.03125 °C (nominal)
• Conversion Time: 21 ms (max)
• Reference Resistor: 430Ω (PT100 default)
• Logic Level: 3.3V / 5V compatible

🧩 Typical Applications

• Industrial temperature monitoring
• Laboratory measurement systems
• Process control and automation
• Arduino and ESP32 temperature projects
• Data logging systems
• Heating and cooling control

⚠️ Important Notes

• RTD probe is not included.
• Pre-configured with 430Ω reference resistor for PT100 operation.
• For PT1000 use, replace the reference resistor with 4300Ω.
• Terminal blocks and headers may require soldering.
• Ensure correct wiring configuration before powering.

📦 Package Includes

• 1 × MAX31865 RTD Converter Module

🔗 Recommended Accessories (Not Included)

• PT100 RTD Sensor – standard temperature sensing probe
• PT1000 RTD Sensor – higher resistance alternative
• Arduino or ESP32 Board – SPI communication and control
• Dupont Jumper Wires – quick prototyping connections