Level limit switch
Series VN 4000
Technical Information / Instruction manual
page G
Introduction
Applications
The device is used for level monitoring in all types of
containers and silos.
It can be used with all powdery and granulated bulk materials
with a densitiy greater than 30 g/l (1.9lb/ft
3
) that do not show a
strong tendency to form crusts or deposits.
The units can be delivered with Ex-approvals for use in Dust
Hazardous Areas.
A selection of fields of application:
•
Building materials industry
lime, moulding sand, etc.
•
Food industry
milk powder, flour, salt, etc.
•
Plastics industry
plastics granules etc.
•
Timber industry
•
Chemical industry
•
Mechanical engineering
The VIBRANIVO oscillating probe is normally screwed into
the lateral container wall so that it is level with the filling
height to be registered and monitored.
The device can also be mounted from the top of the
container. In this case an extension piece is used to mount
the probe level with the height to be registered.
The length of the probe can be up to 4m (157”) with an
extension tube (VN 4030) .
The use of a sliding sleeve is recommended so that the
switch point can be changed continuously during operation
of the device.
Function
The piezo-electrically stimulated oscillating fork vibrates
at its mechanical resonance frequency. If the probe is
covered by the bulk material, the damping thus generated
is registered electronically and a corresponding signal
output is actuated.
The oscillation of the fork ensures a certain self-cleaning
effect..
optional
sliding
sleeve
application in
down pipe
Vibranivo
®
1
2
3
4
5
6
7
8
9
10
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VN 4000 a
gi161213
3
VN 4030
VN 4020
VN 4030
VN 4020
VN 4020
VN 4030
VN 4020
VN 4030
