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
Recordable indicator and sensor up to 30000 psi for pressure test rig
KL1 Cable Junction Box for Submersible Level Transmitters
Vacuum gauge to measure both absolute & negative gauge pressure
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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
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Absolute Reference Pressure Range
Referenced to absolute zero pressure or a perfect vacuum
- a
- A
- abs
- ABS
300°C max temperature, 0 to 300 bar, high range pressure sensor- Vacuum gauge to measure both absolute & negative gauge pressure
DMP331 Precision Pressure Transmitter- Absolute Pressure Transmitters
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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
DMD341 Compact Differential Air Pressure Sensor
0-100Pa air pressure transducer with a 0-10V analog output- 1 psi delta pressure sensor with 4 to 20 mA output
DPS300 User Switchable Pressure Range, Volts or Current Output Low DP Sensor
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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.