What type of gauge is used to measure a vacuum of 500 microns?

To measure a vacuum of 500 microns, a capacitance manometer is commonly used. This type of gauge is sensitive and can accurately measure low-pressure ranges, including vacuums down to the micron level. Another option is a thermocouple gauge, which can also measure vacuum pressures in similar ranges but may be less precise than a capacitance manometer. Both instruments are suitable for applications requiring high accuracy in low-pressure environments.