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January 2002 : ActiveX®• Rectangular Air Pad


Run Screen

ActiveX® Software Interface Added to SiloPatrol® System

Elburn, IL – Unaffected by dust, vapors, vessel construction, or acoustic noise, the SiloPatrol® inventory monitoring system provides reliable continuous level measurement in a variety of applications. Monitor Technologies' economical system recently added a new user interface, an ActiveX® software package.

When using Monitor's ActiveX® software package, SiloPatrol inventory monitors can be integrated into a PLC/PC control system, without the use of analog signals. The SMU "smart" sensor uses RS-485 multi-drop communications which, in conjunction with the use of the available ActiveX® software, significantly cuts the cost of installation by simplifying wiring and eliminating the need for analog I/O cards.

The communication driver contained within Monitor's ActiveX® software manages the message handling with the SMUs. The specific ActiveX® controls provided allow the control system designer to easily place SiloPatrol inventory monitoring functions directly into the system's operator interface screens and control the SMU(s). In Screen Design Mode, the available sensor functions can be placed exactly where they are needed by "dragging and dropping" them in place.

Monitor offers two versions of the ActiveX® software package: basic and full-featured. Both packages can be used to request and read measurements and to read status and error messages. The full-featured software will further save time for control system designers by providing ActiveX® controls that will convert and calculate units of measure, construct bin icons and setup alarms.

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.

Monitor's SiloPatrol system also features a PC-based inventory management system. The SiloTrack™ software package provides a flexible graphical interface upp to 128 "smart" output sensors.

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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