Liquid level monitor
US4291575A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 1979 |
| Grant date | Sep 29, 1981 |
| Priority date | — |
| Expiry date | Jun 27, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/162
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus is provided for monitoring the level of a liquid in a reservoir, especially in the situation where the liquid is a high temperature, molten material. The device operates as a static-tube differential pressure sensor and includes an open-ended tube with one end adapted for direct immersion in the liquid and with the other end being in pneumatic communication with a conventional differential pressure transducer. The meniscus of the liquid entering the tube essentially acts as a diaphragm membrane and eliminates the need for an immersible diaphragm, as conventionally used with static-tubes. The device may actuate a controller for compensating any change in the liquid level from a reference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.