How does one measure temperatures that are too hot for humans to be near? A traditional thermometer would be used for temperatures of around 200 degrees Fahrenheit and would destroy them if exposed to anything higher. Electronic thermometers can handle heat inside a computer but not a furnace at over 2000 degrees. The only option would be to use a type K thermocouple.
The sensors have been specially developed to with stand extremely harsh environments. Whether it's probing a blob of lava or drilling a whole a mile under the ice, thermocouples are the work horse in the temperature measuring department. Developed using two different types of thermo conducting wire with two ends joined together to create a joint. They produce a voltage as the temperature rises or falls.
They require no external power to produce these voltages due to the thermal gradient the materials experience. Commercially they are not expensive and are easy produced. Accuracy of the measure meant is due to the materials being used to produce the couples and the instruments used to measure the changes in the voltages. The more expensive monitoring devices can compensate for the differences in that may occur.
A wide range of temperatures can be measured using these devices and some factors can influence the measurement. One of these is the environment they are to be used in. If it is a chemically harsh atmosphere the couple can erode and the life span of it can be drastically reduced. By shielding it by means of a sheath it can be protected and thus its life span extended.
They are built for reliability and due to the unique characteristics they can be used in high vibration environments and chemically harsh atmospheres. The couple itself is low cost but the instrument used to interpret the voltage variance can be costly. On the other hand they can be calibrated to the different types of couples used, thus they can improve the precision and accuracy of the measured voltage.
Type K is the most common general purpose couple. It has a more average sensitivity compared to other types and is inexpensive to produce. It is used in a relatively wide variety of probes and can measure from extreme negative temperatures to extremely high temperatures. One of the conducting materials used in this type of conductor is magnetic and can be susceptible to deviation I n the output voltage.
To differentiate between the different types available, a color combination of the wire sheathing is used. For the type K it will be yellow for positive and red for negative. If the couple is corroded it can lead to incorrect measurements and could give a low reading on the output voltage and may even fail altogether. This often occurs when the couple corrodes due to chemicals and moisture.
Thermocouples have made a large impact on the steel production industry. By adding various metals into a mixture at varying temperatures new alloys can be created. The only way to check if the correct temperature has been reached before adding the next metal is through the use of these couples. The thermocouple itself will be the most likely one to be used for this application.
The sensors have been specially developed to with stand extremely harsh environments. Whether it's probing a blob of lava or drilling a whole a mile under the ice, thermocouples are the work horse in the temperature measuring department. Developed using two different types of thermo conducting wire with two ends joined together to create a joint. They produce a voltage as the temperature rises or falls.
They require no external power to produce these voltages due to the thermal gradient the materials experience. Commercially they are not expensive and are easy produced. Accuracy of the measure meant is due to the materials being used to produce the couples and the instruments used to measure the changes in the voltages. The more expensive monitoring devices can compensate for the differences in that may occur.
A wide range of temperatures can be measured using these devices and some factors can influence the measurement. One of these is the environment they are to be used in. If it is a chemically harsh atmosphere the couple can erode and the life span of it can be drastically reduced. By shielding it by means of a sheath it can be protected and thus its life span extended.
They are built for reliability and due to the unique characteristics they can be used in high vibration environments and chemically harsh atmospheres. The couple itself is low cost but the instrument used to interpret the voltage variance can be costly. On the other hand they can be calibrated to the different types of couples used, thus they can improve the precision and accuracy of the measured voltage.
Type K is the most common general purpose couple. It has a more average sensitivity compared to other types and is inexpensive to produce. It is used in a relatively wide variety of probes and can measure from extreme negative temperatures to extremely high temperatures. One of the conducting materials used in this type of conductor is magnetic and can be susceptible to deviation I n the output voltage.
To differentiate between the different types available, a color combination of the wire sheathing is used. For the type K it will be yellow for positive and red for negative. If the couple is corroded it can lead to incorrect measurements and could give a low reading on the output voltage and may even fail altogether. This often occurs when the couple corrodes due to chemicals and moisture.
Thermocouples have made a large impact on the steel production industry. By adding various metals into a mixture at varying temperatures new alloys can be created. The only way to check if the correct temperature has been reached before adding the next metal is through the use of these couples. The thermocouple itself will be the most likely one to be used for this application.
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