ESCO Air Conditioning Practice Exam 2025 – Complete Study Resource

The type of gauge used to measure microns is an electronic vacuum gauge. This type of gauge is specifically designed to measure very low pressures, which is critical when working with refrigeration and air conditioning systems. Microns are a measure of pressure under vacuum conditions, and for accurate readings, especially when evacuating a system to remove moisture, an electronic vacuum gauge is preferred.

Electronic vacuum gauges provide a direct reading of vacuum levels in microns with high precision. They are able to measure pressures well below atmospheric pressure, offering readings that can go down to the range of 0 microns or lower, which is essential for ensuring the integrity of a system during evacuation processes. While an analog gauge may also measure low pressures, its accuracy at micronic levels is inferior to that of an electronic vacuum gauge.

Furthermore, manifold gauges and pressure gauges are typically used for measuring refrigerant pressures in air conditioning systems, but they do not measure vacuum levels in microns effectively. Therefore, the electronic vacuum gauge is the most suitable option for this specific task.