Differential pressure gauge transmitter
US4890497A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 25, 1988 |
| Grant date | Jan 2, 1990 |
| Priority date | — |
| Expiry date | Aug 25, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/065
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
For use in a process control current loop including an external electrical power source that is series connected to the transmitter which is in turn connected to a fixed resistance receiver (that may be in the form of a system controller, a computer, a digital readout device, or the like) that in turn is series connected to the electrical power source, with the transmitter being arranged to provide an analog display of differential pressure or pressure sensed by the instrument and also provide for transmission to the receiver of a signal in the 4-20 milliamp range that is proportional to any changes in the differential pressure or pressure sensed by the instrument.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.