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.
- Compound +/-2.5 mbar DP transmitter, indicator & alarm switch
- Negative 30 inHg vacuum gauge with 0-10V output
- LEO3 Current or Digital Output Pressure Gauge
- DPS200 HVAC Differential Pressure Transmitter
Any pressure measured relative to a full vacuum, whether above or below the surrounding ambient air pressure, is called an absolute pressure.
- 100 mbar abs vacuum transmitter with a 5 bar overpressure
- 15000 psi combined pressure gauge and logger with USB interface
- Vacuum insulation 15 psi absolute range millivolt output pressure sensor for air extraction use
- 800 to 1200 mbar atmospheric pressure transmitter