Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1994-12-05
1997-08-26
Hofsass, Jeffery
Communications: electrical
Condition responsive indicating system
Specific condition
340606, 116112, 116264, 116273, 200 819R, 307118, 454256, G08B 2100
Patent
active
056614616
ABSTRACT:
An apparatus for detecting the flow direction of a fluid from an apparatus or between two apparatuses such as a biohoods, fume cabinets, or filters. The device includes a conduit horizontal plane and adapted to receive the fluid. A detecting element is disposed within the conduit and is movable in the direction of fluid flow, the detecting element being in direct contact with the fluid. A sensing element may be coupled to the conduit for determining when the detecting element reaches a predetermined position within the conduit. The circuitry coupled to the sensing element enables selection of a desired flow direction and actuates an alarm when the detected flow direction is other than the one selected.
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Hofsass Jeffery
Lefkowitz Edward
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