Digital Differential Pressure Gauges for Cleanrooms & AHUs

A Magnehelic®-style gauge is a mechanical dial instrument that reads differential pressure directly from a diaphragm. The Beck 990 is a digital alternative to analogue Magnehelic®-style gauges, holding its accuracy at low pascal readings and adding a 0 to 10 V or 4 to 20 mA output so the value can also reach a BMS.

Yes. Alongside the local digital display, the Beck 990 has an analogue output, selectable in its menu between 0 to 10 V and 4 to 20 mA, so the same reading shown at the panel or door can be logged and trended in the building management system.

No. The Beck 990 measures differential pressure, overpressure and vacuum of air and non-aggressive gases only. For liquid circuits such as pumps, filters and heat exchangers, use a liquid differential pressure transmitter instead, which uses a sensor built for water pressure.

Common locations are clean room and operating theatre doors, AHU filter panels, and fume cupboards or lab rooms, anywhere staff need to confirm a pressure cascade or filter condition at a glance without checking a separate monitor or BMS screen.

A digital gauge such as the Beck 990 stays accurate at the low pascal readings typical of clean rooms and filters, where a mechanical needle can be hard to read precisely. It also adds a 0 to 10 V or 4 to 20 mA output, so the reading isn't limited to what's visible at the panel.