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.
Contents
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
KL1 Cable Junction Box for Submersible Level Transmitters
Vacuum gauge to measure both absolute & negative gauge pressure
Recordable indicator and sensor up to 30000 psi for pressure test rig
50 psi g freshwater pressure transducer with 10 Vdc output signal
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Sealed Gauge Reference Pressure Range
Not vented to atmospheric pressure, but instead the reference is fixed to 1 bar.
- sg
- SG
PC logging USB interface 200 bar range portable freshwater pressure gauge
Event triggered high sampling rate pressure logger
Submersible sensor for measuring sludge pressure in pipe
700 bar pressure gauge with fast update rate peak memory
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Absolute Reference Pressure Range
Referenced to absolute zero pressure or a perfect vacuum
- a
- A
- abs
- ABS
Barometric 550 to 1150 hPa abs high resolution pressure transmitter
Absolute Pressure Transmitters
LEO Record (Ei) Pressure Data Logger
40 bar absolute 0-20mA output air pressure sensor for pneumatic monitoring
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Differential Pressure Range
The difference in pressure at point B compared to the pressure at point A.
- d
- D
- diff
- DIFF
- dp
- DP
0.1 inH2O differential range 0-10Vdc output between rooms air pressure sensor
3 bar differential pressure sensor for sea water
200 bar gradient pressure sensor with RS232 for use on oil- -200 to 200 Pa bi-directional range 4-20mA output dp pressure transmitter for venturi tube
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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.