In various industries, detecting temperature using the point of cold junction compensation is possible with the help of thermocouple wires. Thermocouple wires are the primary material used to make thermocouple probes.
A thermocouple is a temperature sensor made of two different metals that are joined together at the sensing end. Various thermocouple extension wire cable types, such as J or K thermocouple wire, contain various mixtures of metals. The difference in temperature between the sensing end and the cjc end, also known as the reference end, is represented by the millivolt value provided by the thermocouple at the cjc end.
Thermocouple probes vs. Thermocouple wire?
It is essential to keep in mind that a temperature sensor only measures its own temperature. Using a probe-style sensor and a wire-style sensor depends on some factors. You need to get the thermocouple junction temperature to the temperature of the material you want to measure. The method of this process is important, and it determines which style sensor is good to use.
You can use thermocouple extension wire for various purposes, and they are affordable.
Probe-style and wire-style sensors
For instance, consider measuring the temperature of a fluid in an encased or somewhat encased container. Utilizing a wire-style sensor might be fine in the event that the liquid doesn’t go after the protection or conveyor materials if the fluid is at rest and the temperature is inside the capacity of the materials. However, if the fluid is corrosive, has a high temperature, is flowing through a pipe, or is under high pressure, a probe-type sensor will be a better choice.
Bringing the thermocouple junction to the same temperature as the material you want to measure is important, as already said.
How are protected thermocouple wires recognized?
The thermocouple extension wire insulation is color-coded for easy identification. Normal rules include that the negative lead for insulated thermocouple wire is red. The thermocouple’s color is on the positive lead, as is the overall color of the insulated extension grade wire. Thermocouple-grade wire typically has a brown outer jacket.
White material color-coded tracer thread is common for high-temperature wire is common. You can refer to the usable temperature ranges for wires data for safety. You can also look up data on the metals used in the thermocouple wire, insulation color codes, etc.
Final thoughts:
A thermocouple’s usable length can be affected by a variety of factors. Total loop resistance and electrical noise prevention to the signal are factors to consider when deciding on wire length. The resistance will vary depending on the type, diameter, and length of the thermocouple extension wire because different thermocouple wires are made of different materials.