3M™ Foam Intake Filters are open-cell foam filters on the 990 Overhead Air Ionizer fan intakes that protect the internal components from environmental contamination. Two filters per carton.
Using steady-state DC ion emission, the Overhead Air Ionizer 991 provides consistent static control coverage. The overhead mounting system does not compromise valuable workbench space, is self-balanced, and needs no calibration. It has a bi-color LED visual performance indicator, green for normal operation and red for failure alarm. The auto-clean system reduces manual emitter point cleanings.
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