In industrial process systems, differential pressure gages are popular and often provide a good solution for such situations, but sadly they continue to be ignored or misunderstood. It is so easy to know how differential WIKA pressure gages operate as to know the difference pressure itself.

What is called Differential Pressure?

Basically the difference between two applied forces is differential pressure, or DP or p. For example, if the pressure is 100psi at point A, and the force is 60psi at point B, then the differential pressure is 40psi.

A pressure differential gage is a visual indicator designed to measure and illustrate illustrate the difference in the process system between two pressure points. In the measurement system there are normally two inlet ports, each connected to the regulated pressure points.

By detecting the difference between points, a pressure gauge simplifies the process. Without this pressure differential, an operator or control system can monitor two separate indicators and determine the difference in readings.

There are different pressure gauges measuring principles, but all of these are due to the use of a different sensing element. Based on your submission, which form will be used.

There are four kinds of pressure sensing components.


The bellows are small steel, deep-roofed pipes, with one end sealed and the other left open. When the open end is set, the closed end will move freely.


A circuit membrane, consisting of specific sheets of metal, which can be flat or corrugated consists of the diaphragm press gage. The diaphragm is physically attached to the transmission system, which amplifies and passes the tiny deflections of the diaphragm.


Two corrugated diaphragms, welded together at the outside to form the capsule, are part of a capsule pressure gauge. The measured pressure is placed through an opening in the center of the first diaphragm into the capsule. In order to transmit the interruption of your measurement item to the pointer, the middle of the second diaphragm is connected to the transmitting mechanism.


The tube pressure gauge Bourdon consists of a circular tube bent across an angle of approximately 270 ° which is closed at one end and linked to the process pressure at the other end. The tube tends to straighten up by applying pressure on the inside. The transmission mechanism increases the movement of the tip. You can opt WIKA Pressure Gauge for the best quality.