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What does the suffix a, abs, d, dp and diff, g, rel and sg mean after the pressure units in a pressure range?

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

Toggle
  • Vented Gauge Reference Pressure Range
  • Sealed Gauge Reference Pressure Range
  • Absolute Reference Pressure Range
  • Differential Pressure Range

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

Featured vented gauge reference related products

  • KL1 Cable Junction Box for Submersible Level Transmitters

Sealed Gauge Reference Pressure Range

Not vented to atmospheric pressure, but instead the reference is fixed to 1 bar.

  • sg
  • SG

Featured sealed gauge reference related products

  • Absolute Unvented Reference Hydrostatic Liquid Level Sensors
  • SSPT Subsea Wet-Mateable Electrical Connector Pressure Sensor
  • UPS-HSR USB Pressure Sensor with High Sample Rate Logging

Absolute Reference Pressure Range

Referenced to absolute zero pressure or a perfect vacuum

  • a
  • A
  • abs
  • ABS

Featured absolute reference related products

  • DS200 Combined Pressure Switch, Gauge and Sensor
  • Baroli 05 Industrial Digital Pressure Gauge
  • DMP331P Hygienic Flush Pressure Transmitter
  • S12C SDI-12 Seawater Pressure & Temperature Transducer

Differential Pressure Range

The difference in pressure at point B compared to the pressure at point A.

  • d
  • D
  • diff
  • DIFF
  • dp
  • DP

Featured differential pressure related products

  • High Accuracy DP Sensors
  • Low Differential Pressure Transmitters Low Differential Pressure Transmitters
  • Air DP Sensors
  • Intrinsically Safe DP Sensors

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

  • How do you choose the correct pressure range for a pressure sensor
  • What is the difference between sealed gauge and vented gauge reference?
  • Measuring vacuum with negative gauge or absolute ranges
  • What is the difference between gauge and absolute pressure measurement
  • Pressure device not reading zero? Get troubleshooting tips
  • Can you measure vacuum using a gauge pressure range
  • What does negative and positive gauge pressure mean
  • Measuring negative pressure using a positive differential pressure range
  • Can you have a minus 20 psi gauge vacuum measurement range
  • Simulating 8000 foot altitude with a pressure gauge
  • Using an Absolute Sensor to Measure Gauge Reference Pressure
  • Converting non-vented depth readings & barometric pressure to true depth
  • Using Sealed Gauge Reference Pressure Sensing Devices
  • Output signal orientation for a negative gauge pressure range

Related Technical Terms

  • Absolute Pressure
  • Compound Pressure Ranges
  • Differential Pressure
  • Gauge Reference Pressure
  • MSL – Mean Sea Level
  • Negative Gauge Pressure
  • Reference Pressure
  • SG – Sealed Gauge
  • Suction Pressure
  • Vacuum
  • Vented Cable
  • Vented Gauge

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Wirelessly Measure & Log Pressure

Use this battery powered wireless pressure sensor to transmit readings to a receiver connected to USB, RS485, RS232, cellular network or analog output

Use this battery powered wireless pressure sensor to transmit readings to a receiver connected to USB, RS485, RS232, cellular network or analog output

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