Two wire flow condition sensing system

Details Two wire flow condition sensing system Two wire flow condition sensing system

1990-03-21

1991-09-17

Orsino, Joseph A.

Communications: electrical

Condition responsive indicating system

Specific condition

340611, 7386174, 73DIG11, 2502311, G08B 2100

Patent

active

050498606

ABSTRACT:
A flow sensor for detecting the absence of a minimum fluid flow in a sprinkler system. The fluid acts upon a vane positioned in the fluid path. Movement of the vane controls the position of a slider. The slider's surface has reflective and non-reflective ends which, in response to the vane's movement, reflect or absorb light from a light emission and detection means. The voltages from the light emission and detection means are monitored for indications of the fluid flow. The sensor uses a two wire signal transmitting system.

REFERENCES:
patent: 1967018 (1934-07-01), Bohner
patent: 3882477 (1975-05-01), Mueller
patent: 4295044 (1981-10-01), Anderson et al.
patent: 4367736 (1983-01-01), Gupton
patent: 4727886 (1988-03-01), Conrardy et al.
patent: 4789778 (1988-12-01), Layh

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