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Febuary 2008: SafePoint®



Engineers Drive business Performance Optimization

In concrete production the reliable monitoring of high level conditions in silos is an important aspect of inventory management of cement and flyash.  If the level monitor fails to function properly, large costs due to overfilling of the silo can occur.  This is why the SafePoint® self-validating point level sensor from Monitor Technologies is the best choice for concrete producers worldwide.  The SafePoint incorporates the patented use of Hall-effect technology, dual outputs to indicate both material presence AND unit health, and microcontroller technology along with industry leading features of Monitor’s standard rotary paddle point level monitor, to continuously protect cement and flyash storage and processing from the effects of unknown sensor failure by providing immediate notification of a sensor failure and confirmation of proper operation. 

Concrete producers worldwide use the SafePoint to reliably protect against overfilling. The SafePoint is a "true fail-safe" self-validating level sensor and can save maintenance and plant personnel time and help avoid the costs of these untimely spills and overfill conditions.  The SafePoint level sensor detects electrical and mechanical failure modes that might keep the unit from operating properly.  The SafePoint is a relatively low cost fail-safe level sensor, around $300 US, with state-of-the-art electronics and patented technology, industry-leading screw-on/off cover, two conduit entrances, local indication and separate outputs to continuously monitor it's health status as well as the presence and absence of process material. It is designed specifically for applications with powders and other bulk solids and can be provided for use in Class I and II hazardous areas with CSA (for North America) and ATEX certifications for these environments.

Monitor Technologies LLC is a leading pioneer in level measurement and monitoring instrumentation for the worldwide cement producing industry as well as other industries involved with the storage, processing and handling of powders and bulk solids.  Celebrating its 50th anniversary in 2008, the experience and market knowledge gained over five decades has earned Monitor a reputation for providing high quality and reliable product solutions. Monitor is located in Elburn Illinois.

SafePoint is just one of the many level measurement and monitoring devices designed and manufactured by Monitor Technologies LLC in Elburn, IL.  For additional information please visit, and our weblog at  You can also contact us at 1-800-766-6486 in the USA or 1-630-365-9403.





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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