Rotary
Paddle Level Switch with Triangular Arc Paddle for
Stringy Fibrous Materials
Monitor Technologies’ stainless
steel triangular arc single vane paddle is designed
to work with the KA & KAX and SafePoint® rotary
paddle bin level switches. The triangular arc paddle
helps to provide reliable level sensing for long, stringy
fibrous materials when the level switch is vertically
mounted. The design of this paddle minimizes entanglement
with the target material. Examples of application materials
that are best suited for the triangular arc paddle
include shredded newspaper, Cypress bark, reclaimed
rubber, etc.
Monitor’s paddle product offering consists of the cost-effective Model
KA & KAX bin level switches (pictured) and the SafePoint® truly 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 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, e-mail monitor@monitortech.com
or call 1-800-601-5953 (1-630-365-9403).
About Monitor Monitor Technologies LLC is a leading
supplier 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 by
trusted customer service. Monitor is located in
Elburn, Illinois USA. For more information
please refer to www.monitortech.com or contact
Mr. Greg DeRudder or Mr. Chris Otte of Monitor
Technologies at 1-800-766-6486 (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.
