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March 2010: TrueCap® MK-2 RF Capacitance Level Sensor
RF Capacitance Level Sensor in a Split Architecture Design
for high temperature or vibration applications


RF Capacitance Bin Level Sensor

Monitor’s TrueCap® Model MK-2 RF capacitance point level sensor is designed to provide a superior and stable sensitivity threshold making it suitable for a variety of powder and bulk solids, liquid and slurry applications. The available split architecture design is ideal for applications involving high temperature or vibration.  The probe and electronics are housed in separate enclosures that are mounted apart for each other.  This design removes the electronics from the tough conditions.

For ease of use, the Model MK-2 has push-button calibration and sensitivity selection as well as a built-in automatic temperature compensation circuit that combines with the MK-2’s microcontroller to provide automatic calibration compensation yielding the most stable and reliable RF capacitance point level sensor available today. In addition, the Model MK-2 provides automatic immunity to material build-up on the probe by its driven shield design and contains a universal power supply of 48-240V AC / 24-48V DC.

The Model MK-2 can be combined with the optional remote calibration module, which allows you to interface with the MK-2 from up to 1,000 feet (305 m) away from the sensor using an RS-485 connection. The module can be placed near other control equipment. This is ideal if your materials change often and the material characteristics are so diverse that re-calibration is required. It is also useful if your procedures require probe functionality verification on a regular basis. 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_p_rf2.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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