Continuous Level Measurement of Cement

The Application
Continuous measurement of cement powder in storage silos.

The Problem
Cement silos are a difficult level measurement. The height of the silos, often 100 or more feet, precludes many technologies. The dusty, dirty environment during filling makes ultrasonic measurement unreliable and mechanical devices, such as plumb bobs, maintenance intensive. In many cases, the silos are still manually sounded. An accurate measurement is needed to ensure that enough product is available for production or that there is enough room in the silo to accept an incoming delivery.

The Solution
Drexelbrook installed a DR7000 continuous level radar. The Drexelbrook DR7000 provides continuous level measurement regardless of dust, moisture content, or angle of repose of the granular product even during filling! The system eliminates the need for costly, and potentially unsafe, manual readings – especially in inclement weather conditions such as ice, rain, high winds, or snow.

Benefits
· Saves money, automated measurement.
· Process and inventory management are more efficient.
· No routine maintenance required.
· No moving parts to wear out or hang up.
· Safety – no more climbing silos for manual sounding under adverse weather conditions

*Consult factory for higher temperature or pressure.

Related products

Magnetrol

Displacer switches – single, dual and tri-switch series

Single-Stage Switches

Series A10 displacer type level measurement units are wide differential units calibrated to actuate as a liquid level reaches a given displacer and to deactuate when the level reaches a second displacer. Single stage, wide differential displacer switches are factory calibrated yet field-adjustable to operate over a wide level differential band.

The minimum differential band is approximately 6 inches (152 mm) in water and varies somewhat with liquid specific gravity. The maximum differential is determined by the length of the displacer suspension cable. Series A15 units are calibrated to operate over a narrow level differential band and are ideally suited for liquid level alarm applications on either high or low level.

Dual-Stage Switches

Series B10 displacer type level measurement units are wide differential tandem switches that are factory calibrated with a choice of several switch operating sequences designed to meet virtually any application.

Series B15 units are narrow differential tandem switches that are factory calibrated. Each switch actuates at a different level.

Tri-Stage Switches

Series C10 displacer type level measurement units utilize three electrically separate control signals in a selected sequence in response to liquid level changes.

Series C15 units are wide differential switches with a choice of several operating sequences combining wide and narrow level differential and are factory calibrated.

Magnetrol

E4 Modulevel® liquid level transmitter

The E4 Modulevel® is a loop powered, two-wire instrument, utilizing simple buoyancy principles to detect and convert liquid level changes into a stable output signal. The linkage between the level sensing element and output electronics provides a purely mechanical design and construction. The vertical in-line design of the transmitter results in low instrument weight and simplified installation. The instrument comes in a variety of configurations and pressure ratings for varied applications.

The E4 Modulevel has microprocessor based electronics with 4–20 mA/HART® digital output. E4 supports the FDT/DTM standard and a PACTware™ PC software package allows for additional configuration, diagnostics and trending capabilities.

Other applications

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