Vacuum measuring instruments are devices used to measure the pressure of a vacuum, which is a space devoid of matter. These instruments are essential in a variety of applications, including vacuum technology, scientific research, and industrial processes. Vacuum measuring instruments come in different types, each with its unique features and capabilities. One of the most common types of vacuum measuring instruments is the thermocouple gauge. This device works by measuring the thermal conductivity of the gas in the vacuum. The gauge consists of two wires made of different metals that are joined at one end. When heated, the wires generate a voltage that is proportional to the temperature difference between them. This voltage is then used to calculate the pressure of the vacuum. Another type of vacuum measuring instrument is the ionization gauge. This device works by ionizing the gas molecules in the vacuum and measuring the resulting current. The ionization gauge is highly sensitive and can measure pressures as low as 10^-11 torr. It is commonly used in high-vacuum applications, such as in the semiconductor industry. A third type of vacuum measuring instrument is the capacitance manometer. This device works by measuring the change in capacitance between two plates as the pressure in the vacuum changes. The capacitance manometer is highly accurate and can measure pressures as low as 10^-3 torr. It is commonly used in scientific research and industrial processes. In addition to these types of vacuum measuring instruments, there are also other devices such as Pirani gauges, diaphragm gauges, and Bourdon gauges. Each of these devices has its unique features and capabilities, and the choice of which one to use depends on the specific application.
thermocouple gauge, ionization gauge, capacitance manometer, Pirani gauge, diaphragm gauge, Bourdon gauge
CITATION : "Mark Wilson. 'Vacuum Measuring Instruments.' Design+Encyclopedia. https://design-encyclopedia.com/?E=405849 (Accessed on July 02, 2025)"
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