M5Stack Kmeter Unit with Thermocouple Temperature Sensor (MAX31855) [Discontinued]

Sale price £16.40 Regular price £20.50
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The UNIT Kmeter is a K-type thermocouple sensor from M5Stack with I2C communication interface.

The hardware adopts ESP32-C3 main control + MAX31855KASA+T 14-bit thermocouple digital conversion chip. The internal ESP32-C3 integrated firmware communicates with the thermocouple digital IC to process the raw data and expose the I2C interface where the user can easily obtain the processed temperature data.

This product is specially designed for K-type thermocouples (included). The conversion chip supports thermocouple probes with a measuring range of -200°C to 1350°C, and adopts a general standard flat interface, which is convenient for subsequent replacement of different measurement probes with different ranges to match different needs. It is suitable for industrial temperature collection, monitoring and other scenes that have high requirements for temperature measurement range.


  • ESP32-C3 (supports I2C firmware update)
  • MAX31855KASA+T:
  • 14Bit ADC
  • 0.25°C resolution, accuracy ±2%
  • Support probe type: K type
  • Support the measurement range of the connected probe -200°C to 1350°C
  • I2C communication interface addr: 0x66

Package Contents

  • 1x Kmeter Unit
  • 1x K-type thermocouple probe (measuring range -50°C to 250°C, wire length 1m)
  • 1x HY2.0-4P cable (20cm)


Specifications Parameters
Thermocouple digital conversion IC MAX31855KASA+T: 14Bit ADC, 0.25°C resolution, accuracy ±2%, support probe type: K type, support measurement range -200°C to 1350°C
Standard probe specifications K-type thermocouple, measuring range -50°C to 250°C, line length 1m, thermal response time <1s, interface: standard flat copper plug
Communication protocol I2C, device address: 0x66
Power consumption 5V@24mA
Net weight 9.3g
Gross weight 21g
Product size 56 * 24 * 9.6 mm
Packing size 93 * 138mm


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