There is a loose convention across manufacturers for designating the type of reference that a pressure sensing device has, which can be confusing if you are unfamiliar with specifying this often overlooked but critical specification parameter.
To help identify the reference of a particular pressure range found on a product label or technical data sheet a list of abbreviated suffixes is provided below.
Vented Gauge Reference Pressure Range
Measuring pressure with reference to atmospheric pressure, also referred to as Relative and Vented Gauge:
- g
- G
- rel
- REL
- vg
- VG
- 50 psi g freshwater pressure transducer with 10 Vdc output signal
- +/- 30 inches of water compound range pressure transmitter
- Recordable indicator and sensor up to 30000 psi for pressure test rig
- Vacuum gauge to measure both absolute & negative gauge pressure
Sealed Gauge Reference Pressure Range
Not vented to atmospheric pressure, but instead the reference is fixed to 1 bar.
- sg
- SG
- Logger for verifying water supply pressure over 7 days
- 250 bar pressure transducer with 20 millivolt full scale output
- 15000 psi combined pressure gauge and logger with USB interface
- Water system peak demand pressure and flow data logger
Absolute Reference Pressure Range
Referenced to absolute zero pressure or a perfect vacuum
- a
- A
- abs
- ABS
- BMS water tank 6mH2Og range 0-10V out submersible level sensor
- 30 psi absolute vacuum pressure transmitter for process plant installations
- 400 mbar absolute (not relative) battery supplied vacuum sensing display
- 5 to 30 psi abs range 0-10Vdc output air pressure sensor for air compression use
Differential Pressure Range
The difference in pressure at point B compared to the pressure at point A.
- d
- D
- diff
- DIFF
- dp
- DP
- Air blower 100 inWG range differential pressure transducer
- -15psig 0-10V out negative pressure transducer and display for air extraction use
- USB pressure sensors for detecting water leaks & restrictions
- Clean room temp, RH and pressure monitoring
On product marking labels or any document that includes a description of the pressure range, the reference type is included after the pressure unit type e.g. 15 psi abs or 15 psia.
Related Help Guides
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