Often you will see a measurement of vacuum pressure described as an absolute pressure reading, so is there any difference between the two?
A vacuum pressure is one that is lower than the ambient environment surrounding pressure, and is typically measured relative to a perfect vacuum or full vacuum.
Since the reference pressure is not relative to another pressure and does not change, it is called the absolute reference or absolute pressure reference.
Featured vacuum measurement products
Electronic Vacuum Switches - Electronic vacuum switches offer accurate and reliable pressure control and monitoring in vacuum systems.
DMP343 Low Range Pneumatic Pressure Sensor - DMP343 pneumatic pressure sensor for measuring very low range pressures on pneumatic control systems, heating, ventilation and air conditioning systems (HVAC) .
Any pressure measured relative to a full vacuum, whether above or below the surrounding ambient air pressure, is called an absolute pressure.
A vacuum pressure can always be measured and defined as an absolute pressure, but an absolute pressure can also be used to define pressures outside the vacuum range.
Featured absolute pressure measurement products
DMK331P Flush Diaphragm Pressure Sensor - Screw-in pressure transmitter with flush stainless steel 316L diaphragm for measuring pressures of fluids with very high viscosity from 900 up to 6000 psi
60 psi / 4 bar Low Pressure Calibration Pump – ADT912 - Set precise calibration air pressures from 95% vacuum up to 4 bar / 60 psi.
Related Help Guides
- Measuring liquid level in a sealed tank with a hydrostatic pressure sensor
- Measuring vacuum with negative gauge or absolute ranges
- What is the difference between gauge and absolute pressure measurement
- What does negative and positive gauge pressure mean
- Measuring negative pressure using a positive differential pressure range
- Measuring vacuum as a negative gauge pressure using a dp sensor
Related Technical Terms
- Absolute Pressure
- Barometric Pressure
- MSL – Mean Sea Level
- Negative Gauge Pressure
- Reference Pressure
- Suction Pressure
- Vacuum
