Thermocouple Amplifier and K-Type Thermocouple Interface With Arduino

by mybotic in Circuits > Sensors

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Thermocouple Amplifier and K-Type Thermocouple Interface With Arduino

Thermocouple Amplifier MAX6675.jpg
Thermocouple Type-K.jpg
Thermocouple and Thermocouple Amplifier.jpg

This tutorial teaches the basics on using Thermocouple and Thermocouple Amplifier.

Introduction

Description:

Thermocouple is used to measure temperature. However, the signal level produced by the thermocouple is very small, thus an amplifier is required to collect the signal produced and amplify the signals. In order to do the amplification job, thermocouple amplifier is specially designed to work with thermocouple.

Specification of Type-K Thermocouple:

  • Measurable Temperature Range: 0ᵒC ~ 1100ᵒC
  • Positive Terminal: Red
  • Negative Terminal: Blue
  • Works great with SN-6675

Specification of Thermocouple Amplifier:

  • Input Voltage: DC3.3V to 5V
  • Works great with Type-K Thermocouple

Pin Definition

pin definition.PNG
functions of pins.PNG

Sample Hardware Installation

hardware installation.PNG

Sample Source Code

To get the result, please download the sample source code attached below and upload it into Arduino.

*kindly download the attached MAX6675 Library for your own use.

Result (1)

room tem.jpg

The reading shown on LCD screen when thermocouple is being placed in a room.

Accuracy: ±3~5ᵒC

Result (2)

being burned.jpg

The reading shown on LCD screen when the thermocouple is being heated by using a lighter for few seconds.

Accuracy: ±3~5ᵒC

Result (3)

wet temp.jpg

The reading shown on LCD screen when thermocouple is being immersed in a container of water.

Accuracy: ±3~5ᵒC

Video

Thermocouple Amplifier and K-Type Thermocouple Interface With Arduino