NOHKEN INC.
NOHKEN INC VP11 Series Vibrating Level Sensor
Manufacturer: NOHKEN INC
Model: VP11 Series
Main application
Solid detection. Integration into small equipment
Main feature
Flat detector
Engineers design the detector as a flat vibration plate and project only a small portion into the tank to ensure minimal degradation over time.Extremely robust
The use of a piezoelectric crystal eliminates the need for moving parts. Designers simplify the sensor, which offers a long service life.User adjustable sensitivity
Sensitivity is adjustable to suit specific applications.
Easy installation and low cost
Threaded (G 3/4) and sanitary flange type (1-1/2S) process connections are available.
Compact and lightweight
Vibration plate O.D. 22.5, approximately 220g (VP11N) or 300g (VP11F)
Principle of Operation
The sensor uses a piezoelectric crystal to cause pulsed vibration on the plate. The vibration is followed by ringing.
The ringing decreases as time passes. How it decreases depends on the force applied to the plate.
With material covering the plate, the ringing decreases more rapidly than without material. The sensor compares how the ringing decreases to determine material presence.
The pulsed vibration is synchronized with the ringing to achieve a wide sensitivity adjustable range.
