How can PLC differential pressure transmitters enable automatic monitoring of fan filter clogging? This article explains the differential pressure measurement principle, 4-20mA/RS485 PLC connectivity, PLC threshold alarms and interlock logic, range selection, and maintenance considerations to help reduce energy consumption and improve ventilation system stability.

Can a shielded differential pressure transmitter resolve signal fluctuations in variable frequency drive environments? This article analyzes the anti-interference advantages of 4-20mA, shielding and grounding, cable separation, isolator configuration, and pressure tapping troubleshooting methods to help you quickly identify the root cause of fluctuations and optimize a stable, reliable measurement solution.