Pressure differential sensors are installed on filter panels to measure the pressure drop across the filter, indicating how dirty it has become; marking clean and dirty reference points on these gauges allows maintenance staff to determine when filter replacement is needed during walk-around inspections.
factualpending
Evidence Quote
“One way to monitor how dirty the filters are becoming is to install these Pressure differential sensors onto the sides [and] the panels... Really good tip is to actually mark these so put a sticker or draw a pen or something to display What a clean filter my mark should be and where a dirty filter mark should be”
Created: 8/13/2026, 4:57:53 AM
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