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January 2007 : Rotary Paddle


Rotary Paddle Bin Level Indicator

Rotary Paddle Bin Level Indicator Product Line Does It All


Elburn, IL -- Monitor Technologies LLC is pleased to announce that it's line of rotary paddle bin level indicators is the broadest and most state-of-the-art available and is virtually universal in application for monitoring the presence and absence of powders and bulk solids.  The "rotary paddle unit" first came on the market in the mid 1950's and since 1958 Monitor Technologies has been leading the way.  

Monitor's rotary paddle product offering consists of the Model KA/KAX Bin Monitor and the SafePoint(R) Fail-Safe Bin Monitor unit.  Both models use the industry-first Monitor designed motor shut-off feature to enhance life and minimize wear.  In addition, both the KA/KAX and SafePoint models use a twist-on/off cover so there is no need to mess with bolts, and this makes the initial install and any maintenance quicker and easier to perform.

The Model KA/KAX units meet ordinary and hazardous location requirements, can detect bulk solid materials from 5 pounds per cubic foot and up, and can be used in applications where the process temperature can be up to 750 degrees F.  These units are also very cost effective with a complete system starting at around $200 US.

The SafePoint(R) rotary paddle unit is a unique fail-safe rotary paddle unit that uses patented technology with Hall-effect sensors to continuously monitor the electrical and mechanical aspects of the sensor itself.  The self-validating techniques combined with patented technology, ordinary and hazardous area approvals, high process temperature handling capability, a twist-on/off cover and a purchase price around $300 make this unit the most viable device for critical point level measurement applications wherever bulks solids are concerned.

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!

For more information refer to or contact Ms. Emily Jones at 1-800-766-6486 (630-365-9403).



Spotlight: RF Capacitance Level Sensor
TrueCap Level SensorsTrueCap Light  
TrueCap® MK-2
Advanced RF Capacitance Level Probe

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.

Click here for more information on the TrueCap MK-2 Level Sensor or contact Monitor Technologies LLC at
Tel.: 800-766-6486 in the USA and
Tel.: 630-365-9403 worldwide.


>>Download TrueCap Product Bulletin #413

>>Click here to learn more about other Point Level Switches from Monitor Technologies


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