The Ludlum 3 Survey meter with a 44-9 probe a Gammascount and a Ludlum Model 19 MicroR. The Gammascout is the dosimeter function to measure accumulated radiation. You still need two types survey meters for proper radiological activity surveying for contamination etc. A MicroR survey meter and a GM survey meter. I use Geigerbot to do counts etc.. at http://www.geigerbot.com/
4 pictures simulate the detection of a Dirty Bomb, showing the difference between a GM and a Scintillation probe.
The best radiation measurement tools are at http://www.ludlums.com they are made in the USA
Geiger Bot iphone app
Ludlum 3 survey meter with 44-9 probe
Background radiation 25-31 nominal
27 CPM during afternoon.
Tile, radioactive 100 counts per minute
Ludlum model 19 MicroR meter
Ludlum Model 19 (50% increase in background)
Ludlum model 3 and model 19
Model 19 reading before low radiation target
Model 19 reading with low radiation target
Model 3 reading before low radiation target
Model 3 reading with low radiation target
Model 19 internal components
Radiation report 4-29-11
Lowest radiation point 4-30-2011
Low level tile activity.
Cs-137 1 microcurie inside can
Radio active package 10 uR/hr over twice background