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       Model 4.jpg (18983 bytes)Model 2.jpg (18400 bytes)Model-2D-1.jpg (23553 bytes)
        Model 4             Model 2S           Model 2D                                                 Survey Meters

Standard Features

High impact sealed case provides improved component protection.
Radiation detected Gamma or X-rays above 60 Kev.
Response time 90% of final reading in 7 seconds.
Low battery indicator.
Detector energy compensated, halogen quenched, internally mounted Geiger tube.
Precision within 10% at all levels.
Specific Unit Features

Feature

 Model 4 Model 2S Model 2D
Analog Meter-rugged assembly with shatterproof lexan lens. No Yes Yes
Range selection-multi-purpose range selection switch & battery test 0 mR/hr through 2 R/hr 0-10, 0-100, 0-1000 mR/hr 0-10, 0-100, 0-1000 mR/hr
Battery life: Hrs@ 4 hrs/day

Days constant use

 600

24

 250

15

 250

15
Illuminated digital display Yes No No
Geotropism % of full scale Not Applicable ±2 % ±2 %
Energy dependence (within 20%) 80-1,000 Kev 80-1,000 Kev 80-1,000 Kev
Battery Complement 8 AA alkaline 2 "D" Cell 2 "D" Cell
Audible alarm Automatic instantaneous over 250 mR/hr Optional Yes all ranges
Calibration with Cs-137 ± 10 % ± 10 % ± 10 %
Temperature dependence ± 5 %, -20°C to 55°C ± 10 %, -30°C to 50°C ± 10 %, -30°C to 50°C
Weight 2.9 lbs., 1.4 kg 3 lbs., 1.5 kg 3 lbs., 1.5 kg
Dosimeter Charger & Audible alarm Yes No Yes