Internal Halogen-quenched, uncompensated GM tube with thin mica window,
1.4-2.0 mg/cm2 areal density. Effective diameter of window is 45 mm (1.77 in.).
Operating Range
mR/hr – .001 (1µR) to 100
CPM – 0 to 350,000
µSv/hr – .01 to 1000
CPS – 0 to 5000
Total Counts- 1 to 9,999,000 counts
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 and
X-rays down to 10 KeV through the detector window. 3340 CPM/mR/hr (137Cs).
Smallest detectable level for 125I is .02 µCi at contact.
Meter will hold at OVER RANGE in fields as high as 100 times the maximum reading.
Averaging Periods
This radiation detector display updates every 3 seconds. At low background levels, the update is the average for the past 30-second time period. The timed period for the average decreases as the radiation level increases.
