The radiation type level measuring device
operates on the principle that radiation can be blocked by any substance to a
limited degree. This degree of blockage is measured and translated to indicate
level.
The system itself consists of a radiation
source, a detector, a conversion circuit, and an indicator. The source and
detector are situated above and below the substance to be measured. As the
level of the substance increases, the amount of radiation blocked increases.
Therefore, the amount of radiation received by the detector decreases. This
received radiation is translated into an electrical signal by the converter and
sent to the indicator. A typical radiation type level measuring system is shown
in Figure
 |
| radiation level detector |
see also
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