Process variable measuring and display device and portable power

Details Process variable measuring and display device and portable power Process variable measuring and display device and portable power

1993-07-09

1997-09-30

Peng, John K.

Communications: electrical

Continuously variable indicating

Using a particular modulation

34087039, 345 35, 345211, G08C 1916

Patent

active

056730381

ABSTRACT:
This invention relates to the field of process variable measuring and display devices and portable power supplies for process variable display devices. This invention can be used to measure and display any process variable, including pressure, temperature, volume, and flow rate. Specifically, this invention relates to an electronic process variable measuring device electronically coupled to a battery powered process variable display device which displays both a bar graph trend indication of the process variable and a digital display of the process variable. In a preferred embodiment, the process variable display device is totally self-contained, including the battery operated power supply.

REFERENCES:
patent: 3835465 (1974-09-01), Tannas, Jr. et al.
patent: 4745543 (1988-05-01), Michener et al.
patent: 5049864 (1991-09-01), Barshinger

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