1. What is Differential Pressure?

Definition: Differential pressure (ΔP) is the difference in pressure between two points in a system, calculated by subtracting the lower pressure (P₂) from the higher pressure (P₁).

Purpose: It's crucial for monitoring and controlling fluid systems, HVAC systems, filtration systems, and industrial processes.

2. How is Differential Pressure Calculated?

The calculator uses the simple formula:

Where:

• \( \Delta P \) — Differential pressure (Pascals)
• \( P_1 \) — Higher pressure measurement (Pascals)
• \( P_2 \) — Lower pressure measurement (Pascals)

Explanation: The calculation simply subtracts the lower pressure value from the higher one to determine the pressure difference between two points.

3. Importance of Differential Pressure

Details: Differential pressure measurements are essential for system diagnostics, flow measurement, filter monitoring, and ensuring proper system operation across many industries.

4. Using the Calculator

Tips: Enter both pressure values in Pascals (Pa). The calculator will automatically determine the differential pressure. Negative results indicate P₂ was greater than P₁.

5. Frequently Asked Questions (FAQ)

Q1: What units are used for pressure in this calculator?
A: The calculator uses Pascals (Pa), the SI unit for pressure. 1 Pa = 1 N/m².

Q2: Can I use other pressure units?
A: You'll need to convert other units to Pascals first (1 bar = 100,000 Pa, 1 psi ≈ 6894.76 Pa).

Q3: What does a negative differential pressure mean?
A: It means P₂ was greater than P₁, indicating the pressure gradient is in the opposite direction.

Q4: Where is differential pressure used in real-world applications?
A: Common in HVAC systems, cleanrooms, industrial filtration, flow measurement, and medical equipment.

Q5: How precise should my pressure measurements be?
A: Precision depends on your application. For critical systems, use high-accuracy pressure sensors.