Differential pressure (Δp) is calculated by finding the difference between two pressure readings.
In its simplest form:
Δp = p1 – p2
Where:
- Δp is the differential pressure
- p1 is the higher pressure reading
- p2 is the lower pressure reading
In essence, you subtract the lower pressure from the higher pressure to find the differential pressure. This is commonly used in various applications, such as:
- Flow measurement: Differential pressure across an orifice plate or Venturi meter is used to calculate flow rate.
- Level measurement: Differential pressure between the top and bottom of a tank can determine liquid level.
- Filter monitoring: Increased differential pressure across a filter indicates clogging.
Example:
Let's say you have two pressure readings: p1 = 10 PSI and p2 = 5 PSI.
Δp = 10 PSI - 5 PSI = 5 PSI
Therefore, the differential pressure is 5 PSI.
