Model VP11 - Vibration Level Sensor

General Description

The VP 11 N is a single point level sensor designed for low-cost, solids state indication and control of powder levels in a small hopper or bin. The VP works best in granular and powdered materials of medium to high bulk density. It is especially useful in applications for detection of high and low level. The VP is an excellent replacement of mechanical rotary paddle level controls that are prone to failure. An example is the high level control in a plastic resin feed hopper used in injection molding. The sensor must not be exposed to high temperatures or excessive abrasion.

Operational Description

The sensor utilizes a piezoelectric vibration element to create a specific vibration frequency. If the vibration diaphragm is vibrated for pulse vibration frequency, the reverberant vibration is occurred. When the material covers the sensor, more reverberant vibration is dampened for a given length of time. The damping of reverberant vibration is detected by a piezoelectric element, and processed through a comparator circuit. The sensitivity is set by the

AC voltage with relay output is optionally available by using our power relay unit, Model PR2100 or PR2200.

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