FSG61

Gamma radiation is attenuated when passing through materials. Radiometric level limit detection is based on this principle. The attenuation depends on material density (ρ), thickness (d), and linear attenuation coefficient (µ), which is determined by the radiation source type. Formula: Fs = e^(-µρd) The Gamma source and Gammapilot detector are installed on opposite sides of the vessel at the same height as the detection point. During measurement, µ and d remain constant, and radiation intensity changes according to the measured medium. • No medium in the radiation path → FTG20 counting rate reaches maximum. • Medium covers the radiation path → Radiation attenuation increases, FTG20 counting rate reaches minimum.

Expert

The Gamma radiation source (60Co) provides high penetration energy, making it ideal for: • Level measurement in thick-wall, high-pressure vessels • Density measurement in large-diameter pipes and extended measuring ranges