13 Facts About Aneroid gauge


The widely used Bourdon Aneroid gauge is a mechanical device, which both measures and indicates and is probably the best known type of Aneroid gauge.

FactSnippet No. 741,005

Vacuum Aneroid gauge is used to measure pressures lower than the ambient atmospheric pressure, which is set as the zero point, in negative values .

FactSnippet No. 741,006

For very low pressures, a Aneroid gauge that uses total vacuum as the zero point reference must be used, giving pressure reading as an absolute pressure.

FactSnippet No. 741,007

Aneroid gauge could observe water evaporating, changing to a gas, and felt that this applied even to solid matter.

FactSnippet No. 741,008

Since dynamic pressure is referenced to static pressure, it is neither Aneroid gauge nor absolute; it is a differential pressure.

FactSnippet No. 741,009

Hydrostatic Aneroid gauge measurements are independent of the type of gas being measured, and can be designed to have a very linear calibration.

FactSnippet No. 741,010

McLeod Aneroid gauge isolates a sample of gas and compresses it in a modified mercury manometer until the pressure is a few millimetres of mercury.

FactSnippet No. 741,011

Bourdon pressure Aneroid gauge uses the principle that a flattened tube tends to straighten or regain its circular form in cross-section when pressurized.

FactSnippet No. 741,012

Second type of aneroid gauge uses deflection of a flexible membrane that separates regions of different pressure.

FactSnippet No. 741,013

The calibration of an ion Aneroid gauge is unstable and dependent on the nature of the gases being measured, which is not always known.

FactSnippet No. 741,014

Ionization Aneroid gauge calibration is very sensitive to construction geometry, chemical composition of gases being measured, corrosion and surface deposits.

FactSnippet No. 741,015

Hot-cathode ionization Aneroid gauge is composed mainly of three electrodes acting together as a triode, wherein the cathode is the filament.

FactSnippet No. 741,016

The electrode of a Penning Aneroid gauge is usually finely tapered to facilitate the field emission of electrons.

FactSnippet No. 741,017