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RF Capacitance Cable Extension Unit More Rugged

PROBLEM:
“I need to monitor the presence of material level at a high point without the unit being damaged by the shifting of heavy aggregate material”. Typical to any ready mixed concrete batch plant there is a continuous need to reliably monitor the level of raw ingredients. Some of the stone aggregates included into concrete mix are bulky and heavy. A level monitor with a rigid sensing element, such as a solid rod extended rotary paddle unit, can be damaged.

EXPLANATION:
Ready mixed concrete batch plants do exactly what their name implies. They take the basic components needed to form concrete, i.e. sand, rock and cement powder, and batch them together for loadout into concrete trucks. Concrete is used as a versatile construction material and there are literally tens of thousands of batch plants around North America.

Relative to the storage silos the concrete batch hoppers are rather small and elevated so that trucks can pass underneath for loading. In operation, trucks pass underneath the batch hopper and the ingredients are batched directly into the trucks. As the batching progresses the hopper’s contents are quickly drawn down and need frequent replenishment. It isn’t unusual for am automated batch plant to know the exact number of batches the hoppers can facilitate. As this number approaches the process of filling the hoppers from the large storage silos begins. As the hoppers approach a full condition something is required to detect this full condition and stop the filling process. This is where point level detection is used.

SOLUTION:
The TrueCap® Models MK-2 and 2e are ideal for these applications. The flexible cable extension probe available with the TrueCap product line eliminates this problem. When material shifts the cable probe it flexes right along, thereby eliminating the damaging effect caused by shifting material.

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

 

Related Product Solutions
 

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Eliminating Calibration Drift and Re-Calibration of RF Capacitance Probes

 

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Sharing High Level Detection Amongst Many Bins

 

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Selecting the Right Technology for High Temperature Applications

 

 
Flexar® GWR  
Global Flour Processor Uses Flexar® Guided Wave Radar

A large global flour processor and food products company recently began using the Flexar® guided wave radar in a total of eighteen (18) silos and bins to manage their finished product inventory.  Readings from these continuous level sensors is reported as being reliable and accurate, even during pneumatic filling, contrary to their previous measuring system.  A previous non-performing ultrasonic system was replaced by the Flexar level sensors.  Flexar guided wave radar level sensors were chosen as the best for pneumatically filled dust laden flour silos.

Eight (8) Flexar level sensors are installed in load-out silos that fill bulk trucks with processed and finished flour.  These silos are 12ft in diameter and 35ft tall.  The finished flour is pneumatically conveyed into these silos.  During filling the internal environment of the silos is very dusty and turbulent.  The finished flour in these silos is used for loading bulk transport trucks for distribution.  In addition, ten (10) Flexar level sensors are installed in 40ft high bins that contain bran.  This material is also sent by bulk transport to end users.

All of the Flexar level sensors are equipped with an RS485 digital communications output that is connected to a PC with a graphical user interface for inventory management purposes.  Monitor’s SiloTrack™ inventory management software is used by the facility to monitor and manage material inventories of both the finished flour and the bran.  SiloTrack allows for multiple user viewing and data access via LAN and this is how the facility will be using the software that provides a flexible, graphical user interface, alarms, report generation and history analysis functions.

Guided wave radar is especially well suited to level measurement applications of dusty powder materials even when measuring during pneumatic filling.  Flexar guided wave radar utilizes TDR (time domain reflectometry) technology.  Radar pulses are continuously transmitted down the sensor’s probe and guided to the material surface where they are reflected back to the electronics along the wave guide.  The time-of-flight of the pulses is measured and directly related to the distance to the material surface and its level.

 

>>Click here for more information about Flexar guided wave radar continuous level measurement sensors.
>>Download Product Bulletin 353A
>>Click here to visit our Flexar Website


 

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