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Plastics Silo Level Measurement Solution:

Challenges Keeping Track of Raw Material Inventory at Four Locations Across the Country

Nursery Supplies home office is located in central Pennsylvania. They manufacture plastic garden products at four facilities, Oregon, California, Pennsylvania and Florida. The central buying function, located in Pennsylvania, had to continuously request reports and call the other four facilities for updates on their raw material inventory levels. The administrative cost and the time required was more than a minor irritant.

Many plastic processors with multiple manufacturing locations have this problem. The solution for Nursery Supplies was the implementation of a RMI (Remote Managed Inventory) system. Monitor Technologies specializes in RMI and VMI (Vendor Managed Inventory) systems using the SiloPatrol® inventory monitoring system with SiloTrack™ inventory management software. SiloTrack software enables local control and interface of the sensors and provides for communication to remote locations with its Client software.
Nursery Supplies has a total of over thirty (30) SiloPatrol® sensors in use at four (4) facilities. Each facility uses the SiloTrack™ Server software and the Client software is also installed at the corporate location for central purchasing use. The Client software interfaces with the Server software at each facility via dial-up, LAN or WAN connections. Nursery Supplies has been able to reap the benefits by being able to automatically view inventory levels at all facilities and place orders accordingly. Nursery Supplies indicates that "Monitor's SiloPatrol/SiloTrack RMI solution is an economical, accurate and trouble-free measuring system”.

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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