Differential pressure measurement is actually the difference in pressure between two points in a system. Usually, for filtration applications, the upstream side is placed before the filter, whereas the downstream side is placed after the filter. By using a differential pressure sensor, you can easily monitor the cleanliness of the filter in gas or liquid applications.
Functioning of differential pressure sensors:
Initially, the upstream pressure drives the medium through the filter. A line is generally installed just ahead of the filter and connected to the higher side of the sensor. The filter then eliminates the contaminants from the media.
In the next step, the downstream pressure guides the material through the system with a smaller amount of contaminants than earlier. In order to monitor the differential pressure, a line is often installed in the lower side of the sensor. As soon as the filter is free from the contaminants, it will measure 0 PSI differential pressure. When using differential pressure sensors, you need to remember that the unit will provide a linear output signal depending on its differential pressure.
Advantages of differential pressure sensors:
- Compact size
- No internal elastomers or O-Rings
- mV and High Level Outputs
- unique single diaphragm design
- Easy installation
- Increased accuracy and resolution compared to using two separate sensors
Applications of differential pressure sensors:
Some applications of differential pressure sensors include flow measurements, water filtration for commercial and residential works, hydrogen fuel cells, chillers, medical, and fuel filtration monitoring for diesel engines.
