Since it is very easy to create a sealed gauge from an absolute reference device, it is possible to provide a test tool such as the leo record pressure data logger which can be used for both absolute and sealed gauge reference measurements. It is mostly high pressure ranges that use a sealed gauge reference, but they can also be used for lower ranges if pressure testing over short periods of time, where the effect of atmospheric pressure changes is minimal. Since the introduction of more compact technologies such as silicon pressure sensors, rather than sealing in the atmospheric pressure, it is now more usual to seal in a vacuum and offset the output by 1 bar to mimic the way a sealed gauge device works. The other use for sealed gauge is where a manufacturer wants to provide secondary containment for high pressure safety in case the diaphragm (primary containment) bursts. The changes in atmospheric pressure will be insignificant compared to the full scale range of 350 bar range and the. ![]() Typical applications are in the oil & gas, automotive, aerospace and power-generating sectors, as well as in test. Druck custom-build pressure sensors from standard components, matching accuracy and specification to meet your needs. ![]() VG Vented Gauge, so the reference is vented to atmospheric pressure which is always changing. UNIK 5000 is a configurable platform, offering high performance and bespoke design on a short lead time. SG Sealed Gauge, so it is a fixed to a 1 bar reference. It is not always possible to provide a vent path, for example a depth sensor mounted inside a submersible vehicle which has no vent tube to the surface but the sensor has to measure depth relative to atmospheric pressure at the surface. Both sensors are referenced to an atmospheric pressure. A sealed gauge reference means that the atmospheric pressure is sealed in at around 1 bar. Three grades of performance: Industrial (+/-0.2 FS BSL), Improved (+/- 0.1 FS BSL) and Premium (+/- 0.
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