Radiation-based level measurement 

In radiometric, i.e. radiation-based, level measurement, the measuring device is mounted outside the tank. A cesium-137 or cobalt-60 isotope sends out focussed gamma rays. On the opposite side of the tank, a sensor picks up the gamma rays that have been attenuated by the medium. The level can be calculated via the intensity of incoming radiation.

The advantages

The resulting measurement is unaffected by all the physical and chemical properties of the medium. Measurements in pressurised vessels or tanks with agitators can be easily realised. Different detector versions are available for different vessel shapes and sizes.