Piezo-electric level detector
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United States of America Patent
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-
Mar 26, 1985
Grant Date -
N/A
app pub date -
Feb 2, 1984
filing date -
Feb 3, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The level detector is to be used for starting and stopping an electric system such as a pump. It comprises a piezo-electric crystal (31) squeezingly mounted between two elastically resilient membranes (22, 23) situated between two squeezing members (11, 12). These squeezing members form a top part (11) and a bottom part (12), respectively, which together form a sensor housing (10). On the outside the membranes are coated with a thin, insulating plastic layer (21, 24) and form the electric connection to the crystal. The two membranes are kept separated by means of a plurality of insulating, annular disks (25-28). In this manner a sturdy and reliable mounting of the piezo-electric crystal is obtained.
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