IL – Monitor Technologies VibraRod™ point
level sensor is a very reliable point level sensing unit
that is great to use in a wide variety of applications
within the powder and bulk solids markets. Monitor’s
VibraRod unit is ideal for bulk solids ranging from 3.12
lbs/ft3 (0.05 kg/dm3) with a maximum particle size of 3/8
standard probe size for a VibraRod™ is 9 inches. Pipe
and cable extension units are also available for longer lengths
in top mounted applications. The pipe extension unit uses
1” stainless steel pipe to extend the vibrating sensor
into the vessel, provides structural strength, and affords
a means to secure the assembly to the vessel. The cable extension
is a polyethylene coated steel cable.
VibraRod™ point level sensor also has many other excellent
features to offer such as a single-prong probe design, a
universal power supply, requires no calibration and is very
affordably priced. Monitor’s single-prong design helps
eliminate false signals that typically exists when material
gets clogged or bound between the tines of “tuning
fork” design probes. The vibration action of the VibraRod
acts as a self-cleaning effect for most materials.
Monitor for more information on the VibraRod™, or any
of our full line of level, flow, particle emission and bin
Without Noise or Vibration
IL. — Monitor’s Flo-Pad bin aerator
promotes the flow of any dry bulk powder or granular material
from bins, hoppers and silos. Such materials are highly aerated
when entering the storage vessels, and flow quite easily
entering the vessel by pneumatic or gravity feed. After being
in storage for a time, the air escapes and allows the material
to pack, and behave more like a solid mass than a fluid mixture.
Flo-Pad uses multiple Evassers mounted on a single air plenum
chamber to create multi-directional air release and re-fluidize
is virtually maintenance free and does not create noise or
damaging vibration, like pneumatic or electric actuated vibrating
devices. The Evassers have a standard neoprene boot that is
designed to prevent material backflow. In addition, the Evassers
are less likely to become clogged due to moisture, as are aerators
that use cotton or canvas to diffuse the air.
can be used for virtually any application. They are available
in 18 in. (457 mm) and 60 in. (1524 mm) sizes, having 8 and
28 Evassers respectively. The most effective aeration of dry
bulk materials is typically achieved by use of multiple rows
of Flo-Pads, one row located in each quadrant of the sloping
vessel bottom. Flo-Pad maintains a constant 2 to 5 psi (0.14
to 0.35 bar) supply of air. Units are also available for higher
pressures of up to 80 psi (5.5 bar), to dislodge and move highly
settled materials, and for high temperature applications.
Monitor for more information on the Flo-Pad bin aerator, or
any of our full line of level, flow, particle emission and
bin aeration products.
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,
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
Principle of Operation for the TrueCap RF Capacitance Level
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.