Fluid flow direction and velocity monitor

Details Fluid flow direction and velocity monitor Fluid flow direction and velocity monitor

1994-06-16

1995-10-31

Chilcot, Richard

Measuring and testing

Fluid flow direction

With velocity determination

732025, 7320416, G01F 168

Patent

active

054619106

ABSTRACT:
A fluid flow detection monitor (80), particularly useful in monitoring pressure differentials between a controlled environment and its surroundings, includes a heat source (1) situated between an upstream and downstream thermal sensor (2,3) within a channel (5). The electrical resistance of the downstream sensor varies as the downstream sensor is heated from fluid carried past the heat source. Circuitry is used to detect the electrical resistance differential between the thermal sensors, thereby detecting the presence of fluid flow.

REFERENCES:
patent: 2689932 (1954-09-01), Hornfeck
patent: 3196679 (1965-07-01), Howland
patent: 4542650 (1985-09-01), Renken
patent: 4787251 (1988-11-01), Kolodjski
patent: 4885937 (1989-12-01), Tanaka et al.
patent: 4911009 (1990-03-01), Maeda
patent: 4944035 (1990-07-01), Aagardl et al.
patent: 5108193 (1992-04-01), Furubayashi
patent: 5218866 (1993-06-01), Phillips et al.

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