The Ludlum 3 with the G-M pancake probe is used of surface N.O.R.M. testing.
The Ludlum 2 radiation monitor is suppled with the Geiger-Mueller (G-M) pancake probe, Model 44-9. The analog meter displays CPM and mR/hr and has a 3 positon range switch of x10, x1 and x.1 mR/hr. This configuration of the Ludlum 2 with Model 44-9 probe is ideal for surface NORM testing for Alpha, Beta and Gamma rays.