Radiation Frisker

Handheld Frisker

Detector
Halogen-quenched GM tube with thin mica end window. Mica window density

1.5-2.0 mg/cm2. Effective diameter of window is 45 mm (1.77 in.).

Side wall is .012 inch thick

Operating Range

Up to 50 mR/h. Instrument begins readings in µR/h and changes to mR/h at 1000 µR/h

Up to 500 µSv/h. Instrument begins reading in nSv/h and changes to µSv/h at 1000 nSv/h

Energy Sensitivity

Detects Alpha down to 2 MeV. Detects Beta down to .16 MeV; typical

detection efficiency at 1 MeV is approx. 25%. Detects Gamma down to

10 KeV through the detector window. 3600 CPM/mR/hr (137Cs).

Smallest detectable level for 125I is .02 µCi at contact.