COMPENSATED FLUID LEVEL TRANSMITTER

摘要

A fluid level transmitter combination for placement on a tank having ≦2 tank apertures. At least one flange provides a first, second and third flange aperture over the tank aperture(s). A temperature sensor over the first flange aperture senses a temperature. A first pressure sensor over the second flange aperture senses a first pressure. A level transmitter extends through the third flange aperture for transmitting a pulse signal into the process fluid or at its surface and receiving a pulse echo or a second pressure sensor senses a second pressure. A processor is coupled to the level transceiver or to an output of the second pressure sensor that implements a compensated fluid level determination algorithm using the temperature, first pressure, and pulse echo or second pressure to generate a compensated fluid level measurement for the process fluid. A transmitter is coupled to an output of the processor.

主权项

1. A fluid level transmitter combination, comprising:
at least one flange configured for placement on a tank including no more than two (2) tank apertures that has a process fluid therein, said flange including at least a first, second and third flange aperture formed over said tank apertures; a temperature sensor over said first flange aperture providing a temperature output signal for sensing a temperature in said tank; a first pressure sensor over said second flange aperture having a first pressure output signal for sensing a first pressure in said tank, and a level transceiver coupled to a probe or connector extending through said third flange aperture into said tank for transmitting a pulse signal into said process fluid or at a surface of said process fluid and receiving a pulse echo from said process fluid or a second pressure sensor over said third flange aperture having a second pressure output sensing a second pressure in said tank; a processor coupled to an output of said level transceiver or to said second pressure output, said processor implementing a temperature and pressure compensated fluid level determination algorithm (level determination algorithm) stored in associated memory; a first connection coupling said temperature output signal to said processor, and a second connection coupling first pressure output signal to said processor, wherein said level determination algorithm uses said temperature, said first pressure, and said pulse echo or said second pressure to generate a temperature and pressure compensated fluid level measurement for said process fluid, and a transmitter having an input coupled to an output of said processor.