Differential Pressure Gauges

How does Differential Pressure Gauge work?

24 Jun , 2022

The principle of the differential pressure gauge is founded on measuring how much pressure difference exists between the two. As its name implies, the differential pressure is a measure of two pressures, and then indicates the difference in pressure.

Differential pressure gauges are ideal to measure the following quantities.

  1. Control of contamination in filters
  2. Monitoring of bags for clogging in the dust collector of bags
  3. Over-pressure measurements in clean rooms
  4. Flow measurement for liquid and gaseous media

The purpose of a pressure gauge with a differential function

The differential pressure gauge is comprised of two chambers of medium sealed. The chambers can be separated using measuring components. If the pressure in both chambers is the same, the measuring elements will not feel pressure, while the DP gauge doesn’t show any deflection.

Differential Pressure Gauge Principle
image source: electricalvolt

When using differential pressure gauges various elements of pressure such as diaphragm elements, capsule elements, Bourdon tube, etc are utilized. This allows for a range of scales from between 0.5 Mbar, up to 0 1,000 bar.

In the event of a difference in the pressure in both chambers, then the pressure applied on one element of measurement is greater than the pressure applied to the other chamber element. In this case, the DP gauge displays the deflection.

If there is excessive static pressure it is possible to immediately measure the differential pressure that is low. The diaphragm component provides the capability to overload at a high level. The highest capacity for overload and static pressure should be observed on both the L and H sides.

The transmission of the measuring device’s motion and an indication of pressure is exactly the same as the overpressure gauges previously described in the majority of cases.

The range of scales ranges from 16-16 mbar and 0 25 bars in the accuracy classes ranging from 0.6 2.5 to 2.5.

Area Of Application

  1. Monitoring filter health
  2. Flow Rate Measurement
  3. Detecting Scale Buildup
  4. Detecting Leaks
  5. Level of filling measurement (in sealed containers)

Precision Mass is one of the leading manufacturers of Differential Pressure gauges in India. Contact us today to get the best quality Differential Pressure gauges at an affordable price.

Frequently Asked Questions About differential pressure gauge:

Q1. What is the reason we need a an instrument to measure differential pressure?
A1. Differential pressure gauges determine the variation between pressures. They are ideal for surveillance of the contamination of filters as well as for measuring the level inside closed vessel, measuring overpressure inside clean room, as well as for measuring the flow of liquid and gaseous media as well as for controlling pumps.

Q2. What is the method by which differential pressure gauges are measured?
A2. Find the volumetric flow rate in the square.
Determine the quadratic of the flow factor.
Divide the Volumetric flow by squares of the flow factor.
Multiply the resultant times your fluid’s specific gravity to determine the pressure differential.

Q3. Can differential pressure be negative?
A3. It can also change by as much as +-5 percent depending on the lows or highs during the weather. Pressure meters as well as their fields of application. What is known as differential pressure meters be used to measure negative and positive pressure, as and different pressure?

Q4. What kinds of differential pressure exist?
A4. three kinds: Pressure is divided into three different types. They include: Absolute pressure, Gauge pressure, Differential pressure.



The differential pressure gauge shows the difference in pressure between two given points, often expressed as DP or ΔP; it is an essential pressure reading found in almost all industrial…

12 May , 2021