Monday, December 9, 2013

Facts To Learn About Type K Thermocouple


by Tiffany Gill


Type K thermocouple is one of the most commonly manufactured and used thermocouple or temperature-sensing device in the current world. This device is composed of two terminals also called legs, that is, the positive and the negative. The two legs are the positive lead, which is made of Chromel and the negative lead which is made of Alumel. Chromel is made up of nickel as the main component and Chromium.

Nickel in Chromel makes up about ninety percent of the whole mass whereas chromium makes up ten percent only. The Alumel part is composed of manganese, aluminium, silicon, and nickel. Again, nickel makes the most part, totaling to about ninety five percent whereas the other materials make the remaining 5 percent. Aluminium and Manganese make two percent each whereas silicon makes the remaining 1 percent.

The negative leg is non-magnetic and is colored yellow while the positive leg is red in color and is magnetic. The temperature range for this device is very wide, rendering it preferable for use in many settings. The temperature range extends from -200 to +1260 degrees centigrade. This model has the highest temperature range than the other major models and other temperature transducsing gadgets like thermistors.

Type K thermocouple functions in most environments since it is based on nickel. Nickel has a great ability to withstand corrosion and can work efficiently in hostile and rugged environments. Even in hostile environments, this make of thermocouples still maintains a great level of reliability and accuracy. The sensitivity is very high and is usually approximated at about 41 microvolt per degree Celsius.

It is general practice to have some form of protection covering the device to prevent damage particularly in reducing environments. The protection can be supplied by appropriate ceramic or metal. Protection may not be a required when the gadget is being utilized in oxidizing atmospheres such as electric furnaces with other factors being held constant. Periodic checking and cleanliness are necessary to make sure that proper operation status is maintained.

When picking a temperature sensing device there are some things to think about. The first factor is the error limit. Boundaries of error and sensitivity are greater in model K than the other makes, hence this is among the reasons it is favored a lot. This is a crucial factor especially in processes or applications that can malfunction because of small temperature changes.

Thermocouples can be put to many different applications in various industries. They can be applied in environments that have water, chemicals, or gases due to the nickel part, which is used to make the leads. Some of the places they are applied in include electric furnaces, heaters or engines. In the food industry and health facilities, they are used in form of thermometers to measure temperature.

Type K thermocouple is an inexpensive device and may be bought from any shop that stocks related items. The advantage of the gadget is that it is replaceable in any system through a simple procedure. They appear in a number of varied probes giving a buyer a wide pool of choices to pick from.




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