Unique Vibrating Level Sensor
Ideal For Dust Collection Systems
Dust collection systems require reliable monitoring
of high level material conditions in their hoppers
for safety and proper operation. Material high
level backup conditions in the dust collector hopper
can create conditions that can damage the equipment
and can lead to fires or explosions in some cases. These
dust collection systems are used for collecting a variety
of materials. Many of these materials can be
very light in weight because of the small nature and
density of the dust particles. The range of bulk
density and dielectric constants of materials collected
varies widely. This can be challenging for most
level sensor technologies, but not for the unique Model
PZP vibrating rod sensor from Monitor Technologies. Monitor
is pleased to announce that its Model PZP vibrating
point level sensor is capable of detecting bulk solid
materials with a density as light as 1.0 to 1.5 pcf
(pounds per cubic foot) all the way up to 100 pcf. In
addition, the PZP does not require calibration
and uses a unique diamond shape single element that
is immune to material packing and bridging, unlike
traditional tuning forks.
The Model PZP vibrating point level sensor uses dual piezoquartz crystals. These
crystals respond to electrical excitation by vibrating, which results in the
vibration of the sensing element at about 280Hz. The uniqueness of the
PZP's diamond shape sensing element and electronics provides the sensitivity
to detect very lightweight materials, in addition to heavier materials. This
ultra-lightweight sensing capability down to as light as 1.0 - 1.5 pcf make this
level sensor ideal for dust collection applications.
Monitor Technologies LLC is a leading supplier of
level, flow, particle emission and aeration instrumentation
for the worldwide powder and bulk solids market. The
experience and market knowledge gained over five decades
has earned Monitor a reputation for providing high
quality and reliable product solutions. Monitor
is located in Elburn Illinois, give us a call today
and let us put our creative solutions to work for you!
For more information refer to www.monitortech.com or
contact us at 800-766-6486 / 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.
