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September 2003: DustAlarm® • Air Pad


Model KA
NEW Particle Emission Monitor

Elburn, IL - While providing the same reliability and sensitivity, Monitor Technologies’ new DustAlarm® Broken Bag Detector is an enhancement over the previous design. Continuing to utilize the same proven triboelectric technology the DustAlarm supplies reliable and economical detection of filter failures in exhaust ducts of baghouses, cartridge collectors, and other types of dust collection equipment.

Some of the new features of the DustAlarm are an adjustable alarm level, two conduit entrances with cable glands, a quick-disconnect mounting and a low VDC power supply option. The DustAlarm incorporates a rugged design with a NEMA 4 housing, screw-on/off cover for easier access, and LEDs to simplify installation and setup.

As with all Monitor’s products, the DustAlarm is competitively priced and backed by an industry-leading two-year warranty. In addition, special options are available for high temperature applications such as a high temperature insulator and split-architecture configuration with remote probe/electronics.

Air Pad
Effective Bin Aeration

Elburn, IL - The Monitor rectangular air pad is used to promote the flow of dry bulk powders in a storage vessel. By continuously introducing air into the body of a dry powder, the air pad is able to maintain the fluid like characteristic of aerated powder.

The Rectangular-style air pad features an effective radius of 10 inches and is available at a low cost. Other features include easy installation and minimal maintenance. The air pad also has the ability to adapt to almost any bin configuration.

An external mounting kit is available. This kit can completely eliminate the need to enter the bin to install or service air pad bin aerators. Monitor's air pad and external mounting kit can easily install in existing cutouts of other brands.

Monitor's air pad is designed for many dry powder applications including cement, resins, and carbon black.

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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