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Cement and Aggregates Inventory Management Solution:

Continuous Silo Level Detection and Inventory Management of Ready Mix Cement, Sand, Aggregates

Silo Patrol for Cement LevelsSITUATION:
A company in Illinois, USA with 13 silos that provides pre-blended masonry products and automated mixing stations to construction sites was looking for a way to better control the inventory levels of their raw materials instead of having to do a “visual”.

After some research they decided to go with the SiloPatrol® plumb bob “smart” sensor (SMU) with the SiloTrack inventory management software from Monitor Technologies. They were able to justify the expenditure because of the added benefits of time saved from manually measuring the material levels and for the personnel safety reasons. Now with automatic or on-demand readings, they have more confidence of when they need to re-order raw materials to avoid downtimes waiting for more materials. They can also have a very accurate indication of when the silos are getting full during refilling to prevent the downtime and clean-up costs of an over-filled silo. Plus, personnel make a lot fewer trips up the silos which reduces the risk of injury.

Their initial purchase was for 6 SiloPatrol SMU’s and the SiloTrack inventory management software. Once they realized the value of the continuous “on-demand” level measurement system, they purchased additional SMU’s for more of their silos. Other aspects of the SiloPatrol that they mentioned they appreciated were the simplicity of installation (including wiring and set-up) for the sensor and the inventory management software and that the software works with the current PC on their desk.

Give Monitor Technologies a call and let us put our creative solutions to work for you!


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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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