Gravity: I2C High Temperature Sensor (K-Type, 800°C)

DFRobotSKU: DFR0558
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The PT100 is suitable for most temperature measurements below 400°C, but usually, the temperature of a household natural gas stove can reach over 800°C, and the temperature of the pottery kiln or high-power electric furnace can be more than 1000°C. The K-type thermocouple is commonly used in such ultra-high temperature scenes.

The digital K-type high-temperature sensor consists of a signal amplification conversion module and stainless steel sheathed K-type thermocouple probe. When the K-type thermocouple probe is placed near a high-temperature heat source, the probe generates a small voltage proportional to the temperature due to the thermoelectric effect.

This module uses a MAX31855K dedicated chip to amplify this small voltage, convert it to digital signals and compensate accordingly. The temperature readings can be read through the Gravity I2C interface. The module can measure extremely wide temperatures ranging from -270°C to 1372°C, the error from -200°C to 700°C is within ±2°C, and the error from 700°C to 1350°C is within ±4°C. The attached K-type thermocouple can measure up to 800 °C with an error within ± 2.5 °C.

Connection Example - Raspberry Pi

Connection Example - Arduino


  • 14 bit, 0.25°C digital high-resolution temperature measurement
  • Extremely wide temperature range
  • Wide input voltage, compatible with 3.3V and 5V controllers
  • Gravity I2C interface, convenient connection
  • Fits any K-type thermocouple probe


Signal Amplification Conversion Module

  • Input Voltage (VCC): 3.3V~5.5V
  • Probe: K Type Thermocouple
  • Temperature Range: -270°C~1372°C
  • Resolution: 0.25 °C
  • Error: within ≤ ±2°C(-200°C~700°C) ~ ±4°C(700°C~1350°C)
  • Interfaces: Gravity I2C (Logic Level 0-3.3V)
  • Dimension: 44.0mm*22.0mm

Armored K-Type Thermocouple Probe

  • Temperature Range: up to 800 °C
  • Error: ≤ ±2.5°C
  • Wire Length: 1.5m
  • Probe Length: 50mm
  • Probe Diameter: Φ4mm
  • Features:
    • Waterproof
    • Corrosion Resistant (Weak Acid or Alkali Resistant, Rustproof)
    • High Temperature Resistance



Label Name Description
1 VCC Power VCC (3.3~5.5V)
2 GND Power GND
3 SCL I2C Clock Signal
4 SDA I2C Data Signal
5 BLUE- K type thermocouple negative electrode
6 RED+ K type thermocouple positive electrode

Package Contents

  • 1x Signal Amplification Conversion Module
  • 1x Armored K-Type Thermocouple Probe
  • 1x Gravity 4-pin I2C/ UART Sensor Wire

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