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What are the advantages and disadvantages of using a Thermocouple instead of a regular lab Thermometer?
Wiki User
∙ 12y ago
Two different metals are used to make a thermocouple or thermostat because when temperature changes, they expand and contract to different extents. So, if they are attached to each other, the combined bi-metal strip they make up will bend in one direction if heated and in the other if cooled. This bi-metal strip can then contact or lose contact with another piece of metal and so make or break an electrical circuit which will turn on or off whatever electrical device is being controlled according to the surrounding temperature.
Wiki User
∙ 14y ago
Wiki User
∙ 15y agoWe use thermocouples rather than conventional thermometers because they're more accurate. Additionally, you have to be up close and personal to a conventional thermometer to read it. That might be okay when taking someone's temperature, but if you're interested in the temperature inside something like a kiln or the firebox of a boiler, you're not going to be sticking your head or even your hand in there. In addition to being easier to use and more accurate, the thermocouple is electrical, and its output can be interfaced directly to remotely located indicators, and can be logged (recorded) and/or stored as electronic data. This makes record keeping a snap, and makes for data base searches that can be done at the speed of light.
Wiki User
∙ 15y agoIn some applications where localized temperatures need to determined, thermocouples are useful. Moreover, thermocouples provide wide range of temperature measurements from -200 to 1800 oC.
Wiki User
∙ 13y agoit is used to find the temperature in furnace and also in industry's
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