Detector: Halogen-quenched
Geiger-Mueller tube. Effective diameter 1.75" (45 mm).
Mica window density 1.5-2.0 mg/cm²
Display: 4-digit liquid
crystal display with mode indicators
Averaging Periods: Display
updates every 3 seconds, showing the average for the past
30-second time period at normal levels. The averaging
period decreases as the radiation level increases. User
can select fast 3-second averaging period.
Operating Range:
mR/hr: .001 to 100.0; CPM: 0 to 300,000; Total: 1
to 9,999,000 counts; mSv/hr: .01 to 1,000; CPS: 0 to 5,000
Efficiency: Sr-90
(546KeV, 2.3MeV b max): approx. 75%; C-14 (156KeV b max):
approx. 11%; Bi-210 (1.2 MeV b max): approx. 64%; Am-241
(5.5 MeV a): approx. 36%
Sensitivity: 3500
CPM/mR/hr referenced to Cs-137
Accuracy: ± 15%
Timer: Can set 1-10
minute sampling periods in 1-minute increments, 10-50
minute sampling periods in 10-minute increments, and 1-24
hour sampling periods in 1-hour increments
Count Light: Red LED
flashes with each radiation event
Audio: Beeper beeps
with each radiation event; can be muted
Outputs: Dual miniature
jack drives CMOS or TTL devices, sending counts to computer
or data logger. Submini jack allows for electronic calibration.
Anti-Saturation:
Readout holds at full scale in fields up to 100 times
the maximum reading
Temperature Range:
-10° to +50° C , 14° to 122° F
Power: One 9-volt
alkaline battery; battery life is minimum 200 hours at
normal background, minimum 24 hours at 1 mR/hr
Size: 150 x 80 x 30
mm (5.9"; x 3.2"; x 1.2")
Weight: 350 grams
(12.5 oz) with battery
Option: Wipe Test
Plate; Computer cable and software (IBM PC compatible)