Water quality indicating apparatus having self-cleaning test pro

Details Water quality indicating apparatus having self-cleaning test pro Water quality indicating apparatus having self-cleaning test pro

1998-11-23

2000-06-20

Ballato, Josie

Electricity: measuring and testing

Electrolyte properties

Using a conductivity determining device

324 711, 270 85, G01N 2702

Patent

active

060781785

ABSTRACT:
Water purity indicating apparatus is adapted to operate on AC input power and includes a housing and a pair of test probes extending from the housing for measuring a resistance of water. Also included is a circuit connected to the test probes and provided within the housing for outputting a signal indicating a purity level of the water based on a first AC voltage generated as a result of the measured resistance of the water.

REFERENCES:
patent: 4257887 (1981-03-01), Rak et al.
patent: 4299698 (1981-11-01), Rak et al.
patent: 4496906 (1985-01-01), Clack
patent: 4623451 (1986-11-01), Oliver
patent: 4885081 (1989-12-01), Oliver
patent: 5699272 (1997-12-01), Zabinski

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