What is a Differential Pressure Sensor?
Sun, May 24, 2026
A Differential Pressure Sensor (DP sensor) measures the pressure difference (ΔP) between two points and converts it into a standard 4–20mA or digital signal for PLC and DCS systems.
In real plant work, engineers often search for issues like “why is my DP sensor reading drifting,” “DP reading fluctuation causes,” or “impulse line blockage troubleshooting.” In most cases, the problem is not the transmitter itself, but installation conditions, impulse lines, or process instability.
This guide combines real industrial experience with core technical principles to help you understand, diagnose, and select DP sensors more effectively.
