Aware Electronics Corp. RM specs. As mentioned in the RM-60 brochure, Aware Electronics has available other types of radiation monitors, including pancake tube monitors. The RM-80 is more than three times as sensitive to gamma.
All tubes are halogen quenched.
They are constructed of specially coated stainless steel, mica and ceramic. Joints are fused shut in a furnace with molten glass. They are very rugged. You can unscrew the cover, if so desired. The RM-60's stainless steel mesh is built into the case.