Fluid flow direction detector

Details Fluid flow direction detector Fluid flow direction detector

1991-09-24

1994-03-01

Peng, John K.

Communications: electrical

Condition responsive indicating system

Specific condition

340606, 116112, 116264, 116273, 200 819R, 307118, 454256, G08B 2100

Patent

active

052911829

ABSTRACT:
An apparatus for detecting the flow direction of a fluid between two enclosed spaces, such as hospital rooms, includes a conduit extending along a horizontal plane and adapted to receive the fluid. A detecting element is disposed within the conduit and movable in the direction of fluid flow, the detecting element being in direct contact with the fluid. A sensing element is coupled to the conduit for determining when the detecting element reaches a predetermined position within the conduit. 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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patent: 4963857 (1990-10-01), Sackett
patent: 5142271 (1992-08-01), Bailey et al.

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