The Model 44-9 Exposure Filter Kit (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 exposure.
Model 44-9 Exposure Filter Kit features:
- flattens the response to within ±20% referenced to 137Cs (662 keV) over an energy range of 33 keV to 1.2 MeV
- easy to mount and remove
- filter can be purchased separately or together with a Model 44-9 Pancake GM Detector
Exposure Filter Response (blue line):
Read more about the Model 44-9 Exposure Filter Kit on the Ludlum website