Also known as compound gauges, these measure both pressure and vacuum.

These portable gauges have three different dials to display pressure and vacuum measurements on a low, medium, and high scale.

Often used with chillers and in refrigeration systems, these gauges display the temperature of ammonia relative to the pressure measurement.

Commonly used to indicate clogged filters, these gauges display the difference between two pressure or vacuum measurements.

Unlike other gauges that measure the difference between your system and the atmosphere, these give measurements relative to zero pressure.