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
Air scrubber 10 inH2O negative pressure transmitter - Monitor air scrubber performance with this negative pressure transmitter. 4-20mA output, ranged to -10 inH2O. Ideal for industrial and healthcare applications.
450 mmHg vacuum range pressure gauge - The Baroli 05 pressure gauge can be supplied with a negative gauge vacuum range and display the pressure in millimetres of mercury (mmHg) pressure units.
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
DMP333 High Range Precision Pressure Transmitter - The DMP 333 is a stainless steel 316L wetted parts pressure sensor for high pressure ranges on applications such as hydraulic test benches, presses, and hydraulic actuation.
Detecting water intake blockage on submerged reservoir intake screen using two sensors - Discover a robust solution for measuring head loss and detecting ice blockages on remote water intake screens. Learn how dual submersible pressure transmitters with 4-20mA outputs overcome long-distance signal transmission challenges in reservoir monitoring.
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
