Do you want to integrate a Type K thermocouple into your DIY project with ESP32 or ESP8266? This module is the solution. Based on the MAX31850 chip, this amplifier converts the low-voltage analog signal from the thermocouple into precise digital data, accessible via the popular 1-Wire protocol.

It's the perfect component for creating your own high-temperature sensors (for ovens, 3D printers, boilers) and sending them to Home Assistant (via ESPHome or Tasmota) or integrating them with your Shelly ecosystem using MQTT.

Technical Specifications of the Type K Thermocouple Reader Module (MAX31850) 1-Wire

• Main Chip: MAX31850K

• Communication Protocol: 1-Wire (Requires only one data pin)

• Probe Compatibility: Designed exclusively for Type K Thermocouples.

• Operating Voltage: 3.0V to 3.6V (compatible with 3.3V logic of ESP32/ESP8266).

• Measurement Range (Chip): -200°C to +700°C (with an accuracy of ±2°C).

• Resolution: 14 bits, 0.25°C.

• Additional Features:

  • Integrated cold-junction compensation.

  • Fault detection (open thermocouple or short circuit to GND/VCC).

• Connectors:

  • 2-pin screw terminal for the thermocouple (Type K).

  • Connection pins: VCC, GND, DATA.