To make the thermocouple useful, it is necessary to calibrate it by testing it against known temperatures and recording the voltages generated. It consists of a positive wire made of Chromel (nickel-chromium alloy) and a negative wire made of Alumel (nickel-aluminum alloy). However, the most widely used thermocouple in industrial applications is Type-K, because it responds predictably over a wide temperature range (around -328 ☏ to +2300 ☏) and has a sensitivity of approximately 41 μV/☌. Basics of ThermocouplesĪ thermocouple is made up of two dissimilar metal wires (the term “dissimilar” simply means different). But first, let’s take a quick refresher on the basics of thermocouples. This tutorial will guide you on how to interface the MAX6675 thermocouple module-one of the most commonly used, inexpensive, yet accurate thermocouple modules-to an Arduino. A thermocouple is a type of temperature sensor that uses the thermoelectric effect to measure temperatures ranging from -330☏ to +2460☏. So, how do you measure extremely hot or cold things? With a cunning pair of electric cables called a Thermocouple. Some of the popular options include the DHTxx series, DS18B20, LM35, and TMP36, among others, each offering unique features and capabilities to suit your specific project needs.īut what if you want to measure the temperature of something as hot as a volcano (which can reach well over 1000☌ or 1800☏) or something super-cold like liquid nitrogen (which can be around −195.8 ☌ or −320 ☏)? In such cases, the normal temperature sensor will either melt or freeze completely. If you want to measure temperature with an Arduino, there are many sensors to choose from.
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