Flexar® Guided Wave Radar Reliably Measures Cement and Flyash
Flyash and cement powder can be difficult materials to measure within silos. The primary reason is the heavy amount of dust during filing. Measuring the level of these materials in their storage silos is important to cement production and users of cement such as concrete producers who also use flyash as an additive to concrete to improve the end product quality. For this reason, flyash processors, utilities that produce flyash, concrete producers and cement producers have all turned to guided wave radar and the Flexar® brand guided wave radar to measure the continuous changing level of flyash and cement powder in their storage silos. The success of Flexar guided wave radar in these applications has added to the proven nature of Flexar to continuously measure the level of dusty powders, even during filling.
The Flexar guided wave radar continuous level sensor uses TDR (time domain reflectometry) technology to continuously measure the level of a wide range of powders, granular and liquid materials. A continuous series of radar pulses is emitted and guided to the material surface by the heavy duty stainless steel cable probe. When the radar pulses reach the material surface they are reflected because of the change in dielectric constant. The time-of-flight of these radar pulses is measured and directly related to the distance measured.
Flexar continuous level sensors can provide RS485 digital communications output or 4-20mA/HART output. The RS485 can be connected to Monitor’s SiloTrack™ inventory management system. The 4-20mA/HART output can be connected into a plant control system or a local panel meter display. The Flexar unit can be powered by 115/230VAC or low voltage 24VDC.
Monitor Technologies LLC is a pioneer in the level measurement and monitoring of powders and bulk solids. For fifty years Monitor has developed, manufactured and applied a wider range of products and technologies to solve level measurement problems and to provide value driven products to a wide range of industries. For more information about the Flexar guided wave radar continuous level measurement sensor and other fine products from Monitor, please contact Joe Lewis or Emily Jones at 800-766-6486 in the USA or 630-365-9403. You can also visit our websites and Level Measurement blog at www.monitortech.com, www.flexar.info and www.typepad.monitortech.com.
The
SafePoint rotary paddle level switch with a self-validating design
detects material presence plus continuously monitors its own ability
to function. The analysis includes sensor health and system power
failure, which makes the SafePoint truly “fail-safe”.
The SafePoint incorporates patented use of Hall-Effect technology,
dual outputs to indicate both material presence and unit health,
and microcontroller technology to continuously protect bulk solids
processing and storage from the consequences of unknown sensor
failure by providing immediate indication of a sensor failure
and confirmation of proper operation.
Other practical features of the SafePoint include rugged construction,
motor shut-off when paddle becomes impeded to maximize motor life, twist On/Off
cover for bolt free removal, and local status indicating light (except hazardous
location models)
A practical application for the SafePoint would be to use this "true"
fail-safe product if undetected sensor failure could result in a
catastrophic process problem.
