IL. —Monitor Technology’s
BINATROL® diaphragm switches are used to
cost effectively detect the point level of powders
and bulk solids in storage bins. BINATROL® units
can also be used to detect plugged conveyor chutes.
BINATROL® is flush mounted to the vessel and
is non-intrusive. It 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 accessible for indication of material presence.
BINATROL® diaphragm switches are mechanical
devices that require no input power. All installation,
sensitivity adjustments, and maintenance can be
done from outside the vessel.
offers a variety of BINATROL® models that offer:
switch sensitivity for material densities as low as 10
lb/ft3 (160 kg/m3),
Teflon and Stainless Steel diaphragms for compatibility
with a wide range of materials, and
for ordinary and Class II; Division 1, 2; Groups F, G
been the industry’s preferred diaphragm switch
for over 20 years.
more information on BINATROL® diaphragm switches,
or any of Monitor’s full line of level, flow,
particle emission or aeration products, contact:
Emily Jones at 1-800-766-6486.
IL. —Monitor Technologies line of tilt switches
provide cost effective solutions for the high level detection
of bulk solids. Tilt switches are used to prevent overflow
of solids from storage bins, or control solids levels in
open piles. Tilt switches can even be used to prevent under
loading or over loading of solids on conveyor belts.
the unit is suspended above the material being detected. Rising
material makes contact with the switch enclosure, causing it
to tilt. When the body is tilted by more than 17o, an internal
switch is deactivated, providing indication of high material
level. The unit has only one moving part. It requires no calibration
or power, and minimal maintenance.
light duty model TC-3X is constructed from cast aluminum and
is suited for moderately sized solids having a density of 15-60
lb/ft3 (240-960 kg/m3). It can be used in hazardous area locations.
The heavy duty model TC-1 is made from cast iron. It is ideal
for heavy, coarse solids having a density greater than 45 lb/ft3
more information on tilt switches, or any of Monitor’s
full line of level, flow, particle emission or aeration products,
contact: Emily Jones at 1-800-766-6486.
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.