pirani pressure什么意思？
编辑：自学文库
时间：2024年03月09日
"Pirani pressure" refers to a type of pressure measurement technique that utilizes a Pirani gauge. A Pirani gauge is a widely used pressure sensor that operates on the principle of thermal conductivity. It measures pressure by detecting changes in the electrical resistance of a heated wire within the sensor, caused by the cooling effect of gas molecules colliding with the wire. The wire is heated to a temperature higher than the ambient temperature but lower than hot wire anemometers. When gas molecules collide with the wire, it cools down and its resistance changes, allowing for pressure measurements.The Pirani gauge is popular in vacuum applications as it is capable of accurately measuring pressures in the rough vacuum range. It is particularly useful in detecting leaks and monitoring pressure in vacuum systems. It provides a continuous reading of pressure and is known for its sensitivity and reliability.The term "Pirani pressure" is often used to refer to the pressure readings obtained from a Pirani gauge or the pressure range within which the gauge operates effectively. It is an essential tool in various industries, including semiconductor manufacturing, research laboratories, aerospace, and vacuum technology, where precise pressure control is crucial.In summary, "Pirani pressure" is a term related to pressure measurement using a Pirani gauge, which operates on the principle of thermal conductivity and is commonly used in vacuum applications for precise pressure control and leak detection.