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
Digital vacuum/pressure recorder to replace circular paper chart - Upgrade your timber treatment process with the DM01 digital vacuum/pressure recorder. Accurate, reliable, and easy to use, the DM01 replaces outdated circular paper chart recorders, providing efficient data management and improved process insight.
+/- 6 psi / 0.4 bar Low Pressure Calibration Pump – ADT901 - The ADT901 low pressure calibration pump is a hand operated pressure pump designed to generate pressures over +/-6 psi (+/-0.4 bar)
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
IMSTL IP68 Water Temperature and Depth Transmitter - Stainless steel 316L waterproof probe for measuring both water temperature and depth and generating two separate 4-20mA current loop measurement signals.
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
Related Help Guides
- Measuring liquid level in a sealed tank with a hydrostatic pressure sensor
- Measuring vacuum as a negative gauge pressure using a dp sensor
- Measuring vacuum with negative gauge or absolute ranges
- What is the difference between gauge and absolute pressure measurement
- Can you measure vacuum using a gauge pressure range
- What does negative and positive gauge pressure mean
- Measuring negative pressure using a positive differential pressure range
Related Technical Terms
- Absolute Pressure
- Barometric Pressure
- MSL – Mean Sea Level
- Negative Gauge Pressure
- Reference Pressure
- Suction Pressure
- Vacuum
