# How Do Differential Pressure Gauge Work?

Differential pressure gauge is the machine which is used in the industries for measuring the difference between two pressures. Although the working of the differential pressure gauge is simple but many people do not understand it and simply overlook it. The only thing you need to understand is the differential pressure logic in order to comprehend the differential pressure gauge. It is used to simplify the procedure of finding the difference between the pressures. Basic functionality of the differential pressure gauge:

The differential pressure gauge has two points which are called the inlet ports. These are placed on two different points of the system where the difference needs to be measured. The differential pressure gauge automatically measures the pressure at each point and then find the difference between them and give a final result. In other case, when the water pressure gauge is not used then the operator would have to first calculate the pressure with some pressure measuring device at both of the points and then the operator will have to manually subtract the two values to find the difference. This will take more time and the values could have some error.

What are the applications of the differential pressure gauge?

There are number of applications and the processes in the industries in which it is used. The first application is the filter monitoring. The filters pressure is very important to determine whether the filter is clogged or not. The differential pressure gauge is placed there to monitor the differential pressure. As more and more materials get stuck in the filter the differential pressure starts to increase. This is how the operator only watches the value of the differential filter and determines if it is below the maximum value. If it is not, then this means that the filter needs to be replaced. In the systems, in which the level of the liquids need to be determined, the differential pressure gauge is more effective than the other gauges because the other perfect pressure gauge measure the total pressure in which there is not only the pressure of the liquid but also the pressure of the gas or vapours which are located on the top of the container. The differential pressure gauge measures the difference between the total pressure and the pressure of the gas or the vapours which helps in determining the accurate level of the liquid. Similarly, this instrument could be used to measure the difference of the pressure in various reservoirs. Other application of the differential pressure gauge is the measurements of the pressure of the flowing liquid in the pipes. These are easy to use in this aspect as well.