Measuring and testing – Liquid level or depth gauge – Immersible electrode type
Patent
1989-01-13
1990-08-14
Yasich, Daniel M.
Measuring and testing
Liquid level or depth gauge
Immersible electrode type
331 65, 361284, G01F 2326, G08B 2100
Patent
active
049476890
ABSTRACT:
A capacitive level gauge for placement in a container (12) determines the level of substance (14) in the container (12). The gauge (10) includes a measurement capacitor (C1) for measuring level and a reference capacitor (C2) for determining dielectric constant of the substance (14). A controller (34) is responsive to the capacitors (C1, C2) for producing a level signal which simultaneously indicated the level and dielectric constant of the material. The level signal includes a frequency which is representative of dielectric constant and a pulse width representative of level. The gauge (10) supports a first pair of parallel conductive members (26, 28) to establish the measurement capacitor (C1) and a second pair of parallel conductive members (28, 32) spaced along the gauge and below the measurement capacitor (C1) to establish the reference capacitor (C2).
REFERENCES:
patent: 2950426 (1960-08-01), Frome
patent: 3010319 (1961-11-01), Sontheimer
patent: 3010320 (1961-11-01), Sollecito
patent: 4038871 (1977-08-01), Edwards
patent: 4083038 (1978-04-01), Klebanoff
patent: 4194395 (1980-03-01), Wood
patent: 4347740 (1982-09-01), Townsend
patent: 4399699 (1983-08-01), Fujishiro
patent: 4485673 (1984-12-01), Stern
patent: 4590575 (1986-05-01), Emplit
patent: 4592231 (1986-06-01), Kant
patent: 4730489 (1988-03-01), Hoekstra
LandOfFree
Capacitive liquid sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Capacitive liquid sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Capacitive liquid sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-454045