Halogen-quenched GM tube with thin mica end window. Mica window density 1.5-2.0 mg/cm2. Effective window diameter is .360 inch. Side wall is .012 inch thick.
mR/hr – .001 (1µR) to 200 mR/hr
µSv/hr – .01 to 2000
CPM – 0 to 235,400
CPS – 0 to 3923
Total Counts – 1 to 9,999,000 counts
Typically ±15% from factory, ±10% (NIST)Energy Sensitivity1070 CPM/mR/hr referenced to Cs137
Detects alpha down to 2.5 MeV; typical detection efficiency at 3.6 MeV is greater than 80%.
Detects beta at 50 keV with typical 35% detection efficiency.
Detects beta at 150 keV with typical 75% detection efficiency.
Detects gamma and x-rays down to 10 keV typical through the window, 40 keV minimum through the case.
Readout will OVERRANGE in radiation fields as high as 100 times the maximum reading.
Selectable Alert Set Range
mR/hr .001 – 100 and CPM 1 – 350,000. Pulsating beeper sounds the alert. Adjustable alert levels are used for mR/hr / CPM, and µSv/hr / CPS. 70db @ 1m. Alarm will sound when in Timer Mode when set alarm threshold is reached.
USB for use with Free Observer USB Software for PCs
Bluetooth for use with the Observer BLE app for Android OS
Graphic LCD with Backlight.
Carrying Case, Xtreme Boot, Lanyard, Stand, Batteries, Mini-USB Cable, Observer USB Software Download, Certificate of Conformance
1 year limited warranty
Red LED flashes with each count.
Sounds with each count (can be switched off for silent operation)
Two AA alkaline batteries (included). Approx. 800 hrs @ background.
-10° to 50°C (14° to 122°F)
140 X 68 X 33 mm (5.5 X 2.7 X 1.3 in.)
181 g (0.4 lbs.)