Apparatus for indicating how dirty an air filter is in a...

Details Apparatus for indicating how dirty an air filter is in a... Apparatus for indicating how dirty an air filter is in a...

G - Physics

01

N

G01N 21/84 (2006.01) A47L 9/19 (2006.01) A47L 9/28 (2006.01)

Patent

CA 2041829

Abstract of the Disclosure An apparatus is provided for indicating how dirty an air filter is that is disposed in an air stream for removing dirt therefrom. The apparatus includes an arrangement in the form of a light unit for measuring how dirty the air filter is. The apparatus also includes an indicator that is connected to the light unit.

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