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November 2010: Rotary Paddle Level Switch
Flexible Belt Paddle for Rotary Paddle Level Switches

Rotary Paddle Level Switch with Flex Paddle

Monitor Technologies’ three-ply flexible belt paddle is designed to work with the KA/KAX and SafePoint rotary paddle bin level switches. The ex-flex belt paddle helps to provide reliable high level sensing for heavier, larger aggregate materials when the switch is top mounted. Examples of materials that are best suited for the flexible belt paddle include coal chunks, limestone, granite, etc.

Monitor’s paddle product offering consists of the Model KA/KAX bin level switch and the SafePoint® fail-safe level switch.  Both models are designed with a motor shut-off feature to enhance life and minimize wear.  In addition, both the KA/KAX and SafePoint models use a rugged aluminum twist-on/off cover so there is no need to mess with bolts. Monitor’s rotary paddle level switches are very versatile and can be used in a variety of powder & bulk solids storage applications.  A major reason for this versatility is the large selection of paddles, extensions and other accessories.

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.

The SafePoint® rotary paddle unit is a “truly” fail-safe level switch with a self-validating design that detects material presence plus continuously monitors its own ability to function. This analysis includes sensor health and system power failure. The SafePoint incorporates patented use of Hall-effect technology, dual outputs to indicate both material presence and unit health, and microcontroller technology to continuously protect bulk solids processing and storage from the consequences of unknown sensor failure by providing immediate indication of a sensor failure and confirmation of proper operation. The SafePoint is ideal for critical point level measurement applications.For more information, please visit www.monitortech.com or call 1-800-601-5953 / 1-630-365-9403.

For more information please visit: http://www.monitortech.com/product_point.shtml

Monitor Technologies LLC, located in Elburn, Illinois, is a leading manufacturer of level measurement instrumentation, solids flow indicators, 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 backed with trusted customer service. For more information please visit www.monitortech.com.


 

 
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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