Hand-held survey meters

Not very advanced compared with PRDs, hand-held survey meters can be used to detect the location of the radioactive material. These meters could be engineered to possess interchangeable probes consisting of scintillation detectors and phototubes, and large-volume ionization chambers or neutron detectors. ... 

A frisker type hand held radiation meter may be used to survey low levels of contamination and may be used to demonstrate the use of a portal monitor. If a whole body counter is available, student monitoring can be a useful experiment. It can be performed with and without radioactive materials concealed in or on clothing (e.g., lantern mantels, or other available unlicensed materials.) The same can be performed with hand held survey meters, perhaps allowing one group to hide sources and another group to find them. 

Within the industry, cabinet x-ray systems are used to check the thickness ofmetal coatings and to identify defects (e.g., air bubbles in mold compoimd packages). While fypically not a significant source of leakage, these imits need to be checked on a periodic basis with a hand-held survey meter for x-ray leakage and to ensure door interlocks operate properly. The operator manual should be kept adjacent to the unit. 

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