Position of sealed valve or other movable part is indicated without penetrating housing. Flux from magnets connected to stem of hydraulic valve penetrates pressure wall and is sensed by Hall-effect transducer outside wall. When valve closes, moving stem and magnets, voltage from transducer decreases; thus, stem position is indicated without physical contact.
Noncontacting valve-position indicator
NASA Tech Briefs ; 3 , 3
1979-01-01
Miscellaneous
No indication
English
New Noncontacting Rotary Position Sensors
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|Noncontacting-optical-strain device
NTRS | 1970
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