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By holding the open end of the thermocouple at a constant reference temperature and using a microprocessor to read the device, by reading the voltage generated at different temperatures, you can see the temperature of any material that has been immersed in the connector.
j style thermocouples are well suited for industrial use, but there are many different types.
Choosing the right thermocouple for your needs requires understanding the differences between the different types of thermocouples.
although some thermocouples are more specific to a particular temperature range and therefore tend to be more expensive,the j style thermocouple occupies the middle of the potential temperature range.
J style thermocouple are well suited for applications where the measuring temperature does not exceed 750°C and can be used reliably even at temperatures as low as 0°C.
Since most general industrial applications fall within this range, J-type thermocouples are commonly used, especially since they are less expensive than most thermocouples.
Know the temperature range of the thermocouple
The key part of thermocouple sensors that make different types of thermocouple so different in temperature range and cost that they can be read efficiently is the wire material.
The Type B thermocouple, for example, is made of platinum and rhodium and can measure temperatures from 871 a 1,704 degrees Celsius due to the incredible heat resistance of these materials.
J style thermocouple is composed of copper and constants, and although its range is much lower, from 0 a 350 degrees Celsius
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