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

The PT100 is suitable for most temperature measurements below 400C, but usually, the temperature of a household natural gas stove can reach over 800C, and the temperature of the pottery kiln or high-power electric furnace can be more than 1000C. 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 -270C to 1372C, the error from -200C to 700C is within 2C, and the error from 700C to 1350C is within 4C. 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

Features

• 14 bit, 0.25C 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

Specifications

Signal Amplification Conversion Module

• Input Voltage (VCC): 3.3V~5.5V
• Probe: K Type Thermocouple
• Temperature Range: -270C~1372C
• Resolution: 0.25 C
• Error: within 2C(-200C~700C) ~ 4C(700C~1350C)
• 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: 2.5C
• Wire Length: 1.5m
• Probe Length: 50mm
• Probe Diameter: 4mm
• Features:
  • Waterproof
  • Corrosion Resistant (Weak Acid or Alkali Resistant, Rustproof)
  • High Temperature Resistance

Resources

• Product wiki
• More Documents

Pinout

Package Contents

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