SiloPatrol® Provides
Level Measurement For Solid / Water Interface Applications
Elburn,
IL -- The SiloPatrol® plumb bob “smart” level
sensor from Monitor Technologies can be equipped with
an optional stainless steel interface style plumb bob
in order to provide continuous level measurement for
settled solids in a blanket of water. The interface
style plumb bob will penetrate through the water, make
contact with the surface of the solid material and
then retract to provide a level measurement. Examples
of material applications that have been successful
include sand, salt, corn, rice, potatoes and similar
items that are covered by a layer of water. Interface
with other liquids besides water may also be possible.
Please check with Monitor regarding specific applications.
The SiloPatrol uses time-proven weight and cable techniques
and combines Hall Effect sensor technology, state-of-the-art
sealed bi-directional optical sensing, a split-compartment
enclosure design, isolated outputs, SMT (surface mount
electronic technology) and other valuable features
to produce a rugged, reliable and accurate measuring
system designed for the harshest and most dynamic conditions.
In addition, a variety of operator interface devices
and software, like SiloTrack software, are available
to calculate and display material level inventory data.
About Monitor
Monitor Technologies, LLC provides practical solutions
for level measurement instrumentation, solids flow
indicators, particle emission monitors and bin aeration
devices relating to the storage and processing of powders,
bulk solids and some liquids. For more details on Monitor's
product offerings please visit www.monitortech.com
or call 1-630-365-9403.
The TrueCap® Model MK-2
RF Capacitance point level probe is designed to provide a superior
and stable sensitivity threshold making it suitable for a variety
of powder / bulk solids and some liquid or slurry applications.
Advanced features of the Model MK-2 include: > Automatic immunity to material build-up on
the probe by its driven shield design > Push-button calibration > Enhanced temperature compensation > Maximized reliability via smart sensing algorithms
like “self-validating” fail-safe protection > Visible status LED on ordinary location units > Versatility through a variety of configuration
options including: hazardous location version, split architecture
design, quick-connect process connection, stub probe, cable extensions,
solid extensions, Nylon® probes, Ryton® - equiv. probes,
etc.
A practical application for the TrueCap would be to use this level sensor where
a residual material build-up on a different sensor would cause a false material
level indication.
Principle of Operation for the TrueCap RF Capacitance Level
Probe:
The vessel wall and the active probe element establish an impedance reference
between each other when exposed to air which has a dielectric constant of 1.
When materials with a dielectric constant greater than 1 are in close proximity
to the probe, the impedance of the sensing field between the sensor and the vessel
wall will change. Once the amount of change exceeds a threshold that was electronically
determined during the calibration process, an output relay will either be energized
or de-energized depending upon the position of the fail-safe selector on the
probe’s electronic circuit board. A change of as little as .5 pico-farad
is all that is necessary for the probe to sense the presence of material.