Platinum rhodium thermocouple can choose platinum rhodium wire according to temperature

Abstract: platinum rhodium thermocouple can be connected to the multimeter according to room temperature, platinum, rhodium thermocouple by the two different conductor material ( Is usually metal alloys) , to create a conductor voltage near the point of contact. The resulting voltage dependence, but not necessarily proportional to, the rest of the temperature difference of the junction of conductor

platinum-rhodium thermocouple is a widely used temperature sensor measurement and control of the

1, can also be used to convert the power of temperature gradient, they are cheap.

2, swaps, provides a standard interface, and can measure the wide temperature range. With most other methods of temperature measurement, the thermocouple is the power supply, without external forms of stimulus. The main limiting thermocouple accuracy; System error is less than one degree Celsius ( ℃) Is difficult to achieve.

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3, connection of dissimilar metals can produce electric potential is related to temperature. Thermocouple measuring temperature of actual connection specific alloy have a predictable and repeatable relationship between voltage and temperature. Different alloy in different temperature range.

platinum-rhodium thermocouple performance:

corrosion resistance can also be important, when choosing a type of thermocouple. In the middle of the measurement point away from the measuring instrument, the connection can be used in the extension cord is lower than the cost of material, make the sensor. Thermocouple is usually a standardized reference temperature of 0 degrees Celsius. Utility to use electronic methods of different temperature cold junction compensation adjustment device terminal. Electronic instrument can also make up the different characteristics of thermocouple, and therefore improves the precision and accuracy of measurement. Thermocouples are widely used in science and industry; Applications include kiln temperature measurement, gas turbine exhaust, diesel engines, and other industrial processes.

platinum-rhodium thermocouple wire can be in several different metallurgical formula of each type, as is often the case, a decrease in accuracy and cost: special error range, standards, and promotion. Extended level line by the same metal as a more advanced thermocouple is used to connect to a measuring instrument of some distance without introducing additional connection between dissimilar materials will generate unwanted voltage; Connection is the extension of metal, does not produce a voltage. Platinum rhodium thermocouple extension cord is platinum alloy, because it will be expensive platinum for extension cord. Extension cord is specified, there is a very similar thermal coefficient of thermocouple electromotive force, but only in a narrow temperature range.

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