Apparatus for detecting water in fuel

Details Apparatus for detecting water in fuel Apparatus for detecting water in fuel

1985-03-22

1987-01-20

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

Specific condition

340 59, 340603, 73304R, 73304C, 200182, 200190, 200 6104, 200DIG41, 324 61P, 324 62, 324 65R, 324 65CR, 210 86, G08B 2100, H01H 2900

Patent

active

046383050

ABSTRACT:
Diesel fuel tends to deposit an insulating coating on surfaces it contacts. A probe, preferably in the form of a siphon tube, is coupled to a detection circuit which is responsive to either low resistance or high capacitance between the probe and ground. The probe is initially uncoated to make a resistive coupling to a fuel container when accumulated water touches the probe. When insulating deposits from the diesel fuel or other fuel oil coat the probe, capacitive coupling will occur between the probe and the accumulated water. In either case the presence of water triggers an output signal by the detection circuit.

REFERENCES:
patent: 3694804 (1972-09-01), Hill
patent: 4001676 (1977-01-01), Hile et al.
patent: 4227173 (1980-10-01), Clark
patent: 4316174 (1982-02-01), Sutton et al.
patent: 4356406 (1982-10-01), Bartels
patent: 4377550 (1983-03-01), Tokarz
patent: 4389889 (1983-06-01), Larson
patent: 4470301 (1984-09-01), Hutchins et al.
patent: 4497204 (1985-02-01), Kobayashi
patent: 4517547 (1985-05-01), Gray et al.

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