IL - Monitor Technologies'
line of tilt switches for dry bulk materials are economical,
trouble free point level controls. The units are ideal
to eliminate bin overflow or to control levels in open
simple and efficient internal construction with one moving
part results in no calibration and minimal maintenance.
tilt switch is available in a light-duty or heavy-duty models.
The light-duty TC-3X can be used with materials 15-60 lb/ft(3).
The TC-3X also has a dust-ignition proof approval rating
and therefore can be used in hazardous location environments.
IL - Utilizing RF Capacitance
technology, Monitor's PAC-30U and PDC-30 proximity switches
are ideal for a variety of bulk solid applications.
proximity switches are solid state point level devices used
to detect the absence or presence of bulk solids. The compact
configuration makes this product ideal for tight spaces or
low cost level detection. Monitor's proximity switches are
easily installed and calibrated. Model PAC-30U is AC operated
while model PDC-30 is DC operated. Both models have a 30mm
industry standard housing and Monitor's two-year warranty.
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.