Liquid level detection system with floating RFID tag
US8149122B2 · kind B2 · utility
12Cited by
2References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 5, 2009 |
| Grant date | Apr 3, 2012 |
| Priority date | — |
| Expiry date | Aug 12, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/68
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A wireless pump on/off system incorporates a radio receiver and an antenna. An RFID tag is carried on a float. The float can be located in a fluid whose level is to be controlled with at least a portion thereof protruding above the fluid level. Signal strength of a wireless received from the tag can be indicative of at least one fluid level, and responsive thereto a pump can be activated. The pump can be deactivated in response to another received wireless signal, loss of the activating signal indicative of another fluid level or expiration of a preset time interval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.