What does the compound gauge measure?

The compound gauge is designed to measure pressure both above and below atmospheric pressure, making it versatile for various applications in refrigeration and other fields. It can indicate positive pressure, which is pressure above atmospheric levels, and negative pressure, which is vacuum levels, below atmospheric pressure. This characteristic allows technicians to monitor the entire pressure range of a system effectively, from full vacuum conditions to high-pressure operation.

Using a compound gauge is crucial in refrigeration systems where understanding both the pressure and vacuum states helps in diagnosing issues, ensuring proper charging of refrigerants, and maintaining efficient operation. The ability to measure these two distinct pressure ranges facilitates a comprehensive assessment of a system's performance and safety, which is particularly important in ensuring optimal functioning and preventing potential failures.