Differential pressure sensor based level meter
grabcad
A piezoresistive differential pressure sensor, placed within a plastic holder fixed to the tank, detects and compares mineral oil pressure to environmental pressure. The sensor's film bends under pressure differences, altering its resistance which is measured electronically and converted to a digital signal for external computers. The assembly includes an o-ring for sealing and can be mounted on either the top or bottom of the tank, with the latter requiring emptying before sensor replacement. The fixed stand is easy to install without internal access and the entire system weighs approximately 50 grams. This measuring system utilizes a pre-existing pressure sensor technology.
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