IL - Monitor Technologies’ line
of rotary paddle bin monitors are reliable, rugged and
economical. They provide point level control for detection
of dry bulk materials in a wide variety of applications.
Monitor’s paddle units can be used to eliminate
bin overflow, maintain a predetermined material level,
indicate plugging of conveyors and pneumatic lines or
provide any of a number of level control functions
many other available paddle units, Monitor’s rotary
paddle level indicators incorporate a feature that automatically
shuts off the motor of the unit when the paddle is in a
stalled position, which both extends the life of the motor
and minimizes maintenance. Monitor’s paddle units
also have a built-in slip clutch to protect motor and drive
gears from excessive forces and longer-lasting sealed bearings.
Additionally, the paddle units’ new housing features
a twist-on/off cover, 2 conduit entrances and is available
with NEMA 4 and an explosion-proof ratings.
different material densities, particle sizes and flow characteristics
require specific paddles for optimum performance, Monitor
Technologies offers a variety of interchangeable paddle
assemblies to fit most bulk solid application needs. Additionally,
Monitor offers a high-temperature unit and an assortment
of process connections and accessories.
IL - Utilizing excellent sensitivity
and a non-intrusive housing design, Monitor Technologies’ Solids
Flow Detector (SFD-2) and Solids Flow Indicator (SFI) provide
a signal indicating the flow/no-flow condition of solids
and powders in gravity chutes, feeders and pneumatic pipelines.
SFD-2 and SFI use low-power microwaves to sense motion. Microwaves
are virtually unaffected by heat, humidity, ambient light,
pressure, vacuum, high or low temperatures, or dust. This
gives the SFD-2 and SFI with maximum effectiveness in industrial
applications. Both units also carry Hazardous Location Approvals.
non-contact/non-intrusive design ensures long-term reliability
and elimination of process contamination. Intrusive probes
might wear out, break off or inhibit material flow. The ability
to sense through most non-metallic surfaces allows the SFD-2
and SFI to have a non-intrusive flush mounting.
selection of either SFD-2 or the SFI is based upon the type
of output required (relay or analog). With convenient remote
electronics, the SFD-2 provides relay outputs. The SFI has
a variable analog signal relative to the magnitude of flow.
This provides more information for the user than the “on-off” flow
detection of the SFD-2.
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.