Unique Vibrating Level Sensor
Ideal For Dust collection Systems
Elburn,
IL –Dust collection systems are
used for collecting a variety of materials in dust
form. Many of these materials can be very
light in weight, but the range of bulk density
and dielectric constants range widely. This
can be challenging for most level sensor technologies,
but not for the unique Model PZP vibrating 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!
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.