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Thermocouples are sensors used for measuring temperature. They are made with the use of two dissimilar metals. These dissimilar metals are usually alloys and they are joined together in one end. When the junction (the joining point) of these two metals or alloys is heated or ooled, a voltage will be produced. This voltage is correlated to the temperature, which is how it is measured. Mostly, the thermocouples are available in the form of wires that are made of alloys. There are many different types and combinations of thermocouples. These combinations can be metals or calibrations. There are four calibrations that are the most popular- E, J, K and T. If you’re looking for thermocouples that have a higher temperature, you should go for C,GB, R or S calibration. Each calibration will have a different temperature range and environment pliability. The maximum temperature of all these calibrations will also vary. The maximum range is also determined by the diameter of the wire used. A very thin thermocouple may not reach the full temperature range. The thermocouples have been assigned specific spots on a reference table. You can refer to this thermocouple table to find out what the right thermocouple would be for you. Depending on your need, you will be able to get the aid of the international color codes specified for the alloys, the temperature range, limits of error etc. Thermocouples have enjoyed a solid use in various industries. They have a wide temperature range, which makes them beneficial. When you’re planning on getting a thermocouple, you have to consider a lot of things. These are a few of them- temperature range, chemical resistance, sheath material used, vibration resistance, installation requirement, abrasion etc. You also have to find out whether the installation can take place with the equipment you already posses. You should also know what junction you’re looking for. The sheathed thermocouples are available in a variety of forms. There are three main junction types- grounded, ungrounded and exposed. If you get a grounded junction, the thermocouple wires will be on the tip and they will be attached to the inside of the probe wall. This ensures that there is sufficient transfer of heat from outside the junction into the probe wall. If you choose to go with an ungrounded junction, you will get a thermocouple junction that is detached from the probe wall. In such a junction, you will get more isolation of electricity, but the response time will be slower when compared to the grounded junctions. There are many different kinds of thermocouples and all of them have their own specifications. The temperature range the thermocouple works in can determine the voltage with which the temperature is linked, and through this method, you’ll be able to find out the right temperature in which the device works. You can always come to us with your queries and doubts regarding thermocouples.
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