Vacuum gauges measure vacuum or sub-atmospheric pressure, and are used to test vacuum lines and components. A vacuum gauge accurately tests vacuum pressure in fuel systems, and can quickly determine internal engine problems, such as bad rings, valves, and gaskets. Our vacuum pressure gauge models are used with air pressure and non-corrosive fluids, such as water and oil in pumps, filters, compressors, and regulators. These pressure gauges come in many models and specificities. Zoro also carries differential pressure gauges, pressure transducers, pressure modules, and pressure and temperature test kits.