You may not be aware but nearly every pressure measurement device you are using has a positive or negative gauge reference.
The most common type of pressure range for pressure measurement instrumentation is one which has a gauge reference. So if you want to measure vacuum pressure, it would be convenient to use a gauge pressure device which is the most widely available pressure range format.
Vented Gauge (VG) is a pressure referenced to atmospheric pressure via a vent path on the reverse side of the pressure sensing diaphragm.
A guide to absolute pressure measurement including explanations, applications and choice of products for measurements using a absolute reference.
Compound pressure ranges include both a positive and negative pressure range in one pressure measurement device.
A guide to differential pressure measurement including explanations, applications and choice of products for measuring differential pressure
Negative Gauge Pressure is the difference in pressure between any vacuum and atmospheric pressure. The maximum possible negative gauge pressure is always limited by the current ambient atmospheric pressure, which constantly varies, but is typically around 1 bar absolute.
Reference Pressure is the pressure present on the reverse or negative side of a pressure sensing element.
Sealed Gauge (SG) is a type of reference pressure measured relative to a fixed pressure of approximately 1 bar absolute.
Vented Cable has a vent tube running through the inside of the cable to provide a vent path between the electrical connections at either end.
Gauge reference pressure is a pressure measured relative to atmospheric or barometric pressure. The most used pressure reference is gauge pressure which is signified by a (g) after the pressure unit (e.g. 30 psi g), and means that the pressure measured is the total pressure minus atmospheric pressure. There are two types of gauge reference […]
Sealed gauge or SG is a type of pressure reference typically used when a vented reference is not possible because of the type of sensing technology or the need to provide secondary containment overpressure protection.
Gauge reference pressure measuring devices read pressure relative to atmospheric pressure. This ensures that the pressure reading is nominally zero when the pressure on the device is released.
We are trying to simulate an environment of 8000 feet in altitude inside a cylinder. We are located in an area that is 200 feet above sea level.
I’m looking for a sensor and panel indicator for a pressure test rig to measure up to 30,000 psi.
Checking vacuum pressure as a positive pressure and also as a negative pressure depending on the type of vacuum equipment being tested
Submersible pressure sensor to measure 10 bar pressure in pipe that is IP68 for long term submersion in sludge up to 6 metres deep.
I have level data from a non-vented transducer & barometric pressure data, how do I determine the true depth?
It is not unusual for a pressure measurement device to read slightly above or below zero with no pressure applied.
When it is necessary to present gauge reference pressure data, an absolute pressure sensor can be used in some situations if a gauge pressure sensor is not available. An absolute pressure sensor will measure total pressure independent of atmospheric pressure changes, unlike a gauge pressure sensor which measures pressure relative to atmospheric pressure. To convert […]
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.
Determining whether you need gauge or absolute reference pressure is a very important to selecting the right pressure range for a pressure instrumentation.
There are two reference points for measuring a vacuum pressure.