FIELD: measurement technology. SUBSTANCE: invention refers to liquid level indicators employing TV camera that automatically maintains constancy of illumination level of float independent of measured level of liquid. Device is equipped with threshold unit, source of threshold voltage, computer, unit forming and memorizing level of illumination and illumination switch. EFFECT: automatic maintenance of constancy of illumination level. 3 cl, 4 dwg
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LIQUID LEVEL GAUGE | 1997 |
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Authors
Dates
2000-09-27—Published
1998-10-21—Filed