The radioactive isotope gamma source is installed in a container, also referred to as shielding, which emits the radiation only in one direction. The source container and the transmitter detecting the radiation are usually mounted on opposite sides of a vessel or pipe. The emitted radiation e. The actual measuring effect results from the absorption of the radiation by the medium. The intelligent transmitter calculates the level, density or the concentration of the medium from the radiation received.
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How does radiation-based level measurement work? Product attenuates radioactive energy, and the detector outputs a level value based on the energy it measures.
An isotope with low radiating intensity is housed inside source holder on one side of a vessel or pipe. The secure source holder collimates the energy so it is directed only at a detector mounted on the opposite side. As material fills the vessel, less energy reaches the detector which outputs an inferred level measurement. What are the advantages of radiometric instruments?
Radiometric sensors are used for continous level and point-level monitoring in the most difficult solids and liquids applications. The reason for this is nuclear gauges provide a non-contact measurement that delivers accurate readings without touching the process material, so there is no chance of damaging the detectors with harsh, abrasive or corrosive products that would require frequent and expensive maintenance.
External mounting has the added benefit of allowing for installation during ongoing production. What are common applications for radiation-based level measurement? Radiometric sensors measure reliably also under extreme process conditions including high pressures and extreme temperatures.
For the toughest applications, radiation-based level measurement is the only solution. The flexible FiberTrac detector is a popular choice for curved and bullet-shaped vessels, and it is offered in lengths up to 23 feet for continuous level measurement in tall vessels.
Highly sensitive SoliTrac instruments are the perfect fit for vessels with thick walls, or in applications where a small source is required. Application examples for radiometric level measurement Distillation column.
Tracerco™ level system
Radiometric sensor for continuous level measurement
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