MAX6675 Thermocouple Temperature Sensor Module 0-800°C K-Type Temperature Measurement

MAX6675 K-Type Thermocouple Temperature Sensor Module

The MAX6675 is a precision K-type thermocouple-to-digital converter from Maxim Integrated, designed for high-temperature measurement applications requiring accuracy and reliability. Whether you're building a reflow oven controller, a PID temperature regulator, or an industrial monitoring system, this module delivers consistent 12-bit resolution readings over a wide temperature range.

Key Specifications

• Temperature Range: 0–800°C (K-type thermocouple)
• Resolution: 0.25°C (12-bit)
• Supply Voltage: 3.0–5.5V DC
• Interface: SPI 3-wire (SO, SCK, CS)
• Cold Junction Compensation: Built-in, range −20°C to +80°C
• Thermocouple Break Detection: Yes (open-circuit fault detection)
• Output: 12-bit digital temperature data
• Conversion Time: 170ms typical

Features

• Internal cold junction compensation eliminates the need for external reference circuits
• Simple 3-wire SPI interface — easy to integrate with Arduino, STM32, ESP32, and Raspberry Pi
• Open thermocouple detection prevents false readings from disconnected probes
• Wide supply voltage range (3.0–5.5V) for 3.3V and 5V systems
• Compact PCB module with screw terminal for K-type thermocouple connection

Compatible Platforms

Works with Arduino Uno, Nano, Mega, ESP8266, ESP32, STM32, Raspberry Pi, and any microcontroller with SPI support. Compatible with the max6675 Arduino library for quick integration.

Typical Applications

• Reflow oven and soldering station temperature control
• Industrial furnace and kiln monitoring
• PID temperature controllers
• 3D printer heated bed and hotend monitoring
• DIY BBQ and sous vide temperature loggers

Package Contents

• 1 × MAX6675 thermocouple module (module only or with K-type probe, depending on variant selected)

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