The Model 44-9 Ambient Dose Equivalent Filter (Ludlum) is an expansion on the Model 44-9 Pancake GM Detector. It is an energy compensation filter that flattens the energy response to facilitate measuring Ambient Equivalent Dose.
Model 44-9 Ambient Dose Equivalent Filter features:
can be purchased separately or together with a Model 44-9 Pancake GM Detector
flattens the response to within ± 20% referenced to 137Cs (662 keV) over an energy range of 20 keV to 1.2 MeV
easy to mount and remove
Dose Equivalent Filter Response (green line):
Read more about the Model 44-9 Ambient Dose Equivalent Filter on the Ludlum website