A thermocouple is a type of temperature indicator that functions to change the temperature difference in an object into a change in electrical voltage (voltage). This tool has a simple and easy-to-install form that has a measurement error limit of less than 1 °C. This temperature meter is most suitable for measuring a wide temperature range, up to 2300 °C.
Types of Thermocouples
Thermocouples are available in a wide variety of temperature ranges and material types. Basically, the combination of different types of metal conductors will produce different operating temperature ranges. The following are types or types of thermocouples commonly used based on international standards
1. Type E Thermocouple (Nickel – Chromel / Constantan (Cu-Ni alloy))
Type E thermocouple consists of nickel and chromium on the positive side (Thermocouple Grade) while the negative side (Extension Grade) is nickel and copper. This thermocouple has a large output (68 V/°C) making it suitable for use at temperatures between -200˚C – 900˚C. Another property of type E is that it is non-magnetic.
2. Type J Thermocouple (Iron / Constantan)
Type J thermocouple consists of Iron on the positive side (Thermocouple Grade) while the negative side (Extension Grade) is around nickel and copper. Its limited range (0 to +750 °C) makes it less popular than type K. This type J thermocouple has a sensitivity of about ~52 V/°C.
3. Type K Thermocouple (Nickel – Chromel / Nickel – Alloy)
Type K thermocouple consists of; nickel and chromium on the positive side (Thermocouple Grade) while the negative side (Extension Grade) consists of nickel and aluminum. This type of thermocouple is often used for general purposes because it tends to be cheaper. Available for temperature range -200˚C – 1250˚C.
Those are some types of thermocouples that you can adjust to your needs. Be sure to use quality thermocouples such as eti thermocouple, fluke thermocouple, and amprobe thermocouple.
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