Thermocouple Junction Styles |
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| Grounded
Thermocouple Junction The wires in the thermocouples are welded into the tip of the sheath material making it a junction. This junction has faster response than an underground junction. It is recommended for the measurement of static or flowing gas and liquid temperatures and for high pressure applications. It is the most commonly supplied junction type. Underground Thermocouple Junction In this type of thermocouple, the wires are insulated from the sheath with magnesium oxide powder (soft). This type of junction should be used where the thermocouple may come in contact with electrical lines or where the control system requires an ungrounded input. Applications are the same as for the grounded type, but response time is slower than the grounded junction. Exposed Thermocouple Junction The thermocouple wires are completely exposed for fastest response time. The wires are completely exposed to the environment so that this type of junction should only be used in suitable environments. The sheath insulation is sealed at the factory, where the wires emerge, to prevent moisture or gas penetration of the magnesium oxide insulation. It is recommended for the measurement of static or flowing non-corrosive gas temperatures where fast response time is required. |
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Thermocouple Junction Styles
