System and method of liquid level detection
US6988406B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Oct 25, 2004 |
| Grant date | Jan 24, 2006 |
| Priority date | — |
| Expiry date | Oct 25, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system of liquid level detection has a vessel, a sight glass in fluid communication with the vessel, a float positioned in the sight glass, a proximity switch affixed exterior of the sight glass for transmitting a signal relative to a sensing of the float in proximity to the proximity switch, a timer cooperative with the proximity switch for measuring a period of time relative to the signal from the proximity switch, and an indicator cooperative with the timer for producing a humanly perceivable indication when the period of time is at a predetermined limit. The proximity switch can be positioned so as to detect a low level of liquid in the vessel or a high level of liquid in the vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.