Pressure Gauge Range Selection Standard

For a mechanical pressure gauge accuracy is defined either as a percentage of the full scale range or a percent of the span.

Pressure gauge range selection standard. Conclusion to properly select a pressure gauge consider the gauge process range environment accuracy dial. Gauge accuracy pressure gauge accuracy ranges from grade 4a to d according to asme 40 1. When it comes to the highest accuracy within wika s broad selection you will also find precision pressure gauges measuring with accuracies of 0 1 0 25 or 0 6 of the full scale value. To select the right pressure gauge for your application the following factors should be considered.

The maximum operating pressure should not exceed 75 of the full scale range. If a gauge is not selected considering these criteria it may result in fatigue of the bourdon tube. If pulsation is present in the process maximum operating gauge pressure should not exceed 50 of the full scale range. European norm en 837 1 and en 837 3 provide.

Asme b40 100 recommends that normal operating pressure be confined to 25 75 of the scale. Some examples are shown. Pressure gauge scale ranges scale spacing and scale numbering per en 837 wika data sheet in 00 02 wika data sheet in 00 02 12 2008 page 1 of 4 in general the design of the scale depends on scale range nominal size ns diameter of case and accuracy class of a pressure gauge. Standard dual scale metric ranges have a dominant metric inner scale the outer scale is specified in psi.