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Monitor 4 Survey Meter
Compact, general purpose survey meters capable of detecting alpha, beta, gamma, and x-rays over 3 selectable ranges.
A red count light flashes and a beep sounds with each event detected.
Specifications: Monitor 4: Halogen-quenched uncompensated GM tube with thin mica window 1.5-2.0 mg/cm2 thick.
Monitor 4 Energy Sensitivity: 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 75% typical detection efficiency.
Detects gamma and x-rays down to 10 keV typical through the window, 40 keV minimum through the sidewall of the detector.
Normal background is approximately 10-20 CPM.
Gamma Sensitivity: 1000 CPM/mR/hr - Range Switch: X1, X10, X100, Battery Check.
Operating Range: 0-.5, 0-5, 0-50 mR/hr and 0-500, 0-5,000, 0-50,000 CPM - Accuracy: ±10% of full scale (referenced to Cs-137).
Audio Indicator: Internally mounted beeper (can be switched off for silent operation).
Anti-Saturation: Meter will hold at full scale in fields as high as 100 times the maximum reading.
Power Requirements One 9-volt alkaline battery. Battery life is up to 2,000 hours at normal background radiation levels.
Temperature Range: -20° C to 55° C (-4° F to 131° F).
Weight of the Monitor 4: 178 grams (6.3 oz.) without battery.
Size: 145 x 72 x 38 mm (5.7 x 2.8 x 1.5 inches).
Includes: Carrying Case, 1 year limited warranty, and CE mark.
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