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September 2002: MK-2e • Rotary Paddle Units


Model MK-2e
NEW Versatile RF Capacitance Level Sensor

Elburn, IL - Monitor Technologies is launching the NEW TrueCap® Model MK-2e. Featuring a new look, this RF Capacitance sensor has been redesigned as a value-priced and versatile point level control.

Ideal for almost any point level application, the Model MK-2e has several standout features including a high sensitivity of 0.5pF and buildup immunity. The MK-2e is one of the only integral sensor units available that will accept 24VDC as its operating voltage.

Approvals are often an important factor when selecting a level control. The MK-2e caries the CE Mark on all Ordinary location units. For Hazardous locations, the MK-2e is available with both Class I and II approvals allowing one model to serve virtually any application. Both the Ordinary and Hazardous location units are CSA(US/C) approved.

Check out the MK-2e's new look! The twist on/off cover is easy to install and has two conduit entrances for convenient access. A high intensity LED is standard on all Ordinary location integral sensors providing local visual indication of power and material presence/absence without removing the cover.

Rotary Paddle Unit
Dependable Rotary Paddle Units For Point Level Monitoring

Elburn, IL - Monitor Technologies' line of rotary paddle bin level indicators consists of the most reliable, versatile and economical point level control sensors available for detection of dry bulk materials.

Unlike many other available paddle units, Monitor's rotary paddle units 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' housing is NEMA 4 and an explosionproof unit is also available.

Because 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 that can be used in applications where temperatures reach as high as 750°F.

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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