Flexible
Belt Paddle for Rotary Paddle Level Switches
Monitor Technologies’ three-ply flexible belt
paddle is designed to work with the KA/KAX and SafePoint
rotary paddle bin level switches. The ex-flex belt
paddle helps to provide reliable high level sensing
for heavier, larger aggregate materials when the switch
is top mounted. Examples of materials that are best
suited for the flexible belt paddle include coal chunks,
limestone, granite, etc.
Monitor’s paddle product offering consists of
the Model KA/KAX bin level switch and the SafePoint® fail-safe
level switch. Both models are designed with a
motor shut-off feature to enhance life and minimize
wear. In addition, both the KA/KAX and SafePoint
models use a rugged aluminum twist-on/off cover so
there is no need to mess with bolts. Monitor’s
rotary paddle level switches are very versatile and
can be used in a variety of powder & bulk solids
storage applications. A major reason for this
versatility is the large selection of paddles, extensions
and other accessories.
The Model KA/KAX units meet ordinary and hazardous
location requirements, can detect bulk solid materials
from 5 pounds per cubic foot and up, and can be used
in applications where the process temperature can be
up to 750 degrees F. These units are also very
cost effective.
The SafePoint® rotary paddle unit is a “truly” fail-safe
level switch with a self-validating design that detects
material presence plus continuously monitors its own
ability to function. This analysis includes sensor
health and system power failure. The SafePoint incorporates
patented use of Hall-effect technology, dual outputs
to indicate both material presence and unit health,
and microcontroller technology to continuously protect
bulk solids processing and storage from the consequences
of unknown sensor failure by providing immediate indication
of a sensor failure and confirmation of proper operation. The
SafePoint is ideal for critical point level measurement
applications.For more information, please visit www.monitortech.com
or call 1-800-601-5953 / 1-630-365-9403.
Monitor Technologies LLC, located
in Elburn, Illinois, is a leading manufacturer of level
measurement instrumentation, solids flow indicators,
particle emission monitors and aeration devices for
the worldwide powder and bulk solids markets. The experience
and market knowledge gained over 50 years of business
has earned Monitor a reputation for providing high
quality and reliable product solutions backed with
trusted customer service. For more information please
visit www.monitortech.com.
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.