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January 2004 : BulkSonics® • VibraRod™



Ultrasonic Problem Solver
for Difficult Applications

Elburn, IL - With state-of-the-art technology and multiple options, BulkSonics® can provide non-contact ultrasonic continuous level measurement in even the most difficult bulk solid and liquid applications.

The BulkSonics line consists of two groups sophisticated sensors and stand-alone transmitters. The Smart Transmitters combine state-of-the-art transducer technology with the latest software techniques. The software contained within each Smart Transmitter features many programmable parameters allowing the user to easily customize the equipment even in the most challenging applications. All Solids Smart Transmitters come with a joystick aiming device and are available with an optional split-flange for easy assembly and mounting.

Messenger Remote Mointoring Equipment can be used to provide a PC-based interface for the BulkSonics ultrasonic technology at a customer’s facility or to provide remote monitoring for vendor managed inventory applications. Utilizing the XL-70 remote monitoring unit and MessengerWare software yields real-time monitoring with automatic and/or manual updates. Messenger equipment provides value-added inventory management while monitoring up to 32 analog 4-20mA inputs at each site.

Diaphragm Switch
Economical and Reliable
Point Level Detection

Elburn, IL - Monitor Technologies' new VibraRod™ vibrating rod sensor provides reliable point level sensing in a wide variety of applications within powder and bulk solids market. This easy to setup sensor requires no calibration and provides reliable solid state electronic circuitry.

The single-probe vibrating rod design utilized by the VibraRod overcomes typical application difficulties associated with changes in material, electrical dielectric constant, temperature or humidity. Using a single-prong probe eliminates the potential problems such as material build-up and false signaling, which are associated with dual-prong "tuning-fork" type probes.

The VibraRod line of vibrating rod point level sensors is offered in standard length, cable extension or pipe extension versions. The standard length version extends into a vessel approximately 9 inches (235 mm). The pipe extended version can be used to extend the measuring rod up to 118 inches (3 m) and the cable extended unit can be used to extend the probe up to about 65 feet (20 m). Each version can be provided with either a plastic or aluminum housing. All VibraRod units are provided with local indication using a bi-color LED and a traditional relay output.

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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