How to choose a digital pressure gauge: things to consider
If you are not clear about the nuances between the various types, choosing a digital pressure gauge may be difficult. A digital pressure gauge (DPG) is defined here as any pressure measuring device that uses an electronic display to indicate pressure numbers. DPG is in contrast to a dial gauge that uses purely mechanical parts to sense and indicate pressure. Dial indicators have been used in industry for a long time. They usually use a Bourdon tube to indicate pressure, which is mechanically connected to a dial that rotates on a circular scale.
These are intended to provide a local visual indication of the pressure during the process, but usually do not provide a way to transmit the readings. Mechanical dial gauges of this type may be suitable for your application, but they have some inherent disadvantages. These include mechanical wear, difficult to read dials, low accuracy (usually 1.0 percent to 5.0 percent FS), and some sensitivity to mechanical vibration. The advantage is that the cost is low and does not require any power supply, so it is safe to use in hazardous environments.
This article describes some of the reasons why digital pressure gauges may be a better choice for your application. We will discuss two main categories. To identify them, we will call one a digital dial gauge and the other a digital pressure indicator.
