Measuring a negative pressure, or a vacuum, is needed in many manufacturing facilities and industrial labs. Vacuums are used in packaging, manufacturing, processing, and testing. If you need to measure and/or control vacuum pressure, you must buy a transducer with the vacuum pressure type. Vacuum sensors are used to measure pressure which is lower than ambient atmospheric pressure. Pressure is equal to force per unit area. When pressure drops, the power decreases proportionally. A variety of gauges have been developed for different measurement areas, according to the intended use and the operating conditions. These vacuum pressure transmitters can be used to measure partial vacuums on manufacturing processes, food packagers, autoclave sterilizers, leak testers, suction pumps and atmospheric simulators.
| Chemical processing | Freeze drying | Helium leak | Metallurgical processes |
| Detection | Sterilization | Lamp, lighting, and laser products | |
| Cathode ray tubes (CRT) | Electron microscopes | High energy physics | |
| Optical, functional, and plasma-enhanced deposition | Gas delivery manifolds Mechanical vacuum pumps | Mass spectrometers |