What type of gauge is used to measure discharge pressure in a refrigeration system?

In a refrigeration system, the discharge pressure refers to the pressure of the refrigerant as it exits the compressor. To accurately measure this pressure, a high pressure gauge is employed. High pressure gauges are designed to handle pressures that exceed atmospheric levels and can provide readings for the pressures typically found in the discharge line after the refrigerant has been compressed.

The importance of using a high pressure gauge lies in its ability to withstand and measure the significant pressures generated by the compressor, often reaching up to several hundred psi depending on the refrigerant used and the system design. This ensures that technicians can assess the performance and efficiency of the refrigeration system properly.

In contrast, other types of gauges serve different purposes. Low pressure gauges measure pressures in the evaporator side of the system, vacuum gauges indicate levels of vacuum or negative pressure, and environmental pressure gauges may monitor atmospheric conditions but are not suited for evaluating the internal pressures of a refrigeration system. Therefore, the high pressure gauge is specifically vital for assessing discharge pressure effectively.