Flowmeter for explosion-hazard environments

Details Flowmeter for explosion-hazard environments Flowmeter for explosion-hazard environments

1997-10-22

2000-04-04

Fuller, Benjamin R.

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

G01F 166

Patent

active

060447141

ABSTRACT:
A pulse generator (48) in a flowmeter system (10) transmits an excitation pulse to a transducer assembly (12) by way of a signal-conduction medium (20) located in a region subject to an explosion hazard. The amplitude of the excitation pulse is great enough that it would ordinarily trigger an explosion in the hazardous region if one of its cables (22, 23) were to break. But a saturable-core transformer (T1) so limits the excitation pulse's duration as to prevent the explosion.

REFERENCES:
patent: 4187524 (1980-02-01), Peterson
patent: 4345479 (1982-08-01), Loveland
patent: 4355343 (1982-10-01), Gross
patent: 4467245 (1984-08-01), Bloomer et al.
patent: 4882934 (1989-11-01), Leffert et al.
patent: 4943887 (1990-07-01), Bose
patent: 4967302 (1990-10-01), Hutcheon et al.
patent: 5371686 (1994-12-01), Nabity et al.
patent: 5510942 (1996-04-01), Bock et al.

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