Uses solid state piezoelectric vibration principle for detecting material level
Provides relay output when material contacts probe and dampens vibration
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General Description
The VH series are designed for using very low density powder or material such as fibers, perlite, diatomaceous earth, toner, carbon black, white carbon, expanded polystyrene, etc. VH10 is a compact version used for high and low level detection. VH20 is suitable for high alarm in large silos. Pipe Extension up to 2500mm for N model and 4000mm for F model are available.
Operational Description
The vibration reed is welded on two sustention pipes in order to stabilize the vibration mode. Two piezo-electric elements are mounted on the vibration reed. One provides vibration and the other detects damping of vibration. When the vibration reed is covered by material, the piezo-electric element detects damping of vibration. The electronic circuit detects the damping and converts into relay output.
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