Thermocouple Compensating Cable Maximum Length

The thermocouple wire or cable is used to manufacture thermocouple probes in order to sense temperature using the point of cold junction compensation cjc end.

Thermocouple compensating cable maximum length.

We commonly hear what s the maximum thermocouple wire length i can use with your instrument that s a good question. Compensating cable is made from cheaper alloys than extension cable. Is there a maximum length for thermocouples and thermocouple wiring. There are two factors that affect tc cable length.

The tc represents a low impedance source so noise is mitigated to some extent. Part numbers for extension wire typically begin with an ex prefix. The length of a thermocouple has no effect on its measurement accuracy or its ability to transfer the signal to the instrument. On the other side as it has been explain in this other article a thermocouple is a sensor for measuring temperature that consists of two dissimilar metals that are joined together at the sensing end.

There are many factors that can impact the usable length of a thermocouple. What is the maximum length of thermocouple wire. Compensating cable is a type of thermocouple cable that uses a different composition to extension cable true thermocouple cable that is only used to extend a thermocouple signal from the thermocouple sensor back to instrumentation. Where extension cables contain thermocouple elements and can be used to manufacture.

In other words thermocouples do not experience voltage drops or power loss along its length as a high current power line might possess. Maximum length of compensating cable many factors can affect the usable length of a thermocouple. Thermocouple wire may be used as extension wire but extension grade wire may not be used in the sensing point or probe part of the thermocouple. As a guideline under 100 feet with 20 awg or thicker wire in an area free of electromagnetic interference usually is fine.

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