Max6675 Sensor Board Module Thermocouple K-type

The MAX6675 module converts the millivolt output of a K-type thermocouple into a digital SPI temperature reading — measuring from 0°C to +1024°C with 0.25°C resolution. Whether you're monitoring a 3D printer hotend, a kiln, or an industrial furnace, this is the most straightforward path to high-temperature digital sensing.

🔹 Key Applications

• 3D printer hotend and heated bed temperature monitoring

• Kiln and furnace temperature control and logging

• Industrial oven and food processing temperature sensing

• Automotive exhaust gas temperature (EGT) monitoring

• Metal casting and forging temperature measurement

• High-temperature industrial process control

🔹 Why Choose This Module?

• 0–1024°C range — covers most industrial thermal applications

• 0.25°C resolution — accurate enough for precision process control

• SPI interface — compatible with Arduino, ESP32, Raspberry Pi

• Cold-junction compensation built in — accurate ambient reference

• K-type thermocouple compatible — the most widely available thermocouple type

🔹 Technical Specifications

• Chipset: MAX6675

• Interface: SPI (3-wire: SCK, CS, SO)

• Temperature Range: 0°C – +1024°C

• Resolution: 0.25°C

• Input: K-type thermocouple

• Operating Voltage: 3.3 V – 5 V DC

🔹 What's Included

1 × MAX6675 K-type Thermocouple Sensor Module (thermocouple probe sold separately)

🔹 Pro Tip

💡 The MAX6675 requires the junction to be at ambient temperature for accurate cold-junction compensation — don't let the module itself get hot. For 3D printer use, the max_thermocouple library works seamlessly. Note: the MAX6675 has a 0.17-second conversion time — add this delay in your read loop.

⚠️ Note: Always ensure proper heat dissipation and correct voltage configuration before powering connected devices.