Bin Monitor Provides Economical, Reliable Point Level
Monitor Technologies' BINATROL® diaphragm
level switch is a durable, low maintenance and cost-effective
way to monitor levels of powder and bulk solids in
storage bins, silos, and vessels. The BINATROL can
also be used to eliminate bin overflows and detect
plugged or backed-up conveyor chutes for some applications.
The BIN-ATROL switch is flush mount
and non-intrusive which makes it ideal for vessels
limited in size or internal clearance or in situations
where protrusion is not wanted. It can be used on either
flat or curved surfaces. Typical material applications
for BINATROL include: grain, seed, wood chips, sawdust,
powders, cement and more.
The BINATROL unit can be installed,
adjusted for sensitivity, and maintained from outside
the vessel. All parts are accessible from outside the
storage bin without having to remove the mounting flange. The
BINATROL is installed to allow its sensing diaphragm
to be exposed to the material being detected. Bulk
material contacting the unit applies a pressure that
is detected by the diaphragm. This pressure detection
activates an internal switch that is user accessible
for signaling alarms or other methods to indicate material
presence. Also, BINATROL® diaphragm
switches are mechanical devices that require no input
Monitor offers a variety of diaphragm
bin level indicators that can be configured with various
switch sensitivities, diaphragm materials and approval
Monitor Technologies LLC is a pioneering
supplier of level measurement instrumentation, solids
flow monitors, 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.
Monitor is located in Elburn Illinois.
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.