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
300 mmHg absolute vacuum pressure transducer with 10 volts output - Absolute pressure transducer for precise vacuum measurement. 0-300 mmHg range, 0-10V output, high accuracy.
DMP331P Hygienic Flush Pressure Transmitter - Sanitary pressure sensor wth exposed diaphragm with no crevices for high temperatures up to 300 Degrees Celsius in ranges from 100mb up to 40 bar gauge or absolute
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
DMK457 Marine Approved Pressure Transmitter - Marine approved pressure transmitter with 4-20mA current loop output for shipbuilding with optional CuNiFe housing for sea-water compatibility
180 degC pressure sensor for saturated steam up to 10 bar - A built-in cooling element allows the pressure sensor to be used on media temperatures up to 200 degC (FKM seal limit).
Related Help Guides
- Measuring vacuum with negative gauge or absolute ranges
- Measuring liquid level in a sealed tank with a hydrostatic pressure sensor
- 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
Related Online Tools
Related Product and Application Guides
Related Application Questions and Answers
- Ex rated ambient pressure sensor with 800-1100 mbar range
- 20 bar absolute steam pressure transducer
- Vacuum drying pressure data logger
- Low range vacuum pressure logger for 0 to -60 inH2O g
- 180 degC pressure sensor for saturated steam up to 10 bar
- High reading rate for measuring dynamic pressures to -200psf
- 1013 to 1400 mbar barometric pressure transmitter & readout
- Using 25 mbar DP sensor on vacuum below 0.2 bar absolute
- Measuring steam pressure up to 10bar with analog/digital output
- Wind turbine USB PC logging pressure & temperature sensor
- Hydrophone array submersible 200 meter seawater depth sensor
- Gas sensors testing barometric pressure sensor with RS485 Modbus RTU interface
Contact us about this What is the difference between vacuum and absolute pressure page to request more information, or to discuss your application requirements.