Gamma Sensitivity: Operating Range 1000 CPM/mR/hr (referenced to Cs-137) Energy Sensitivity . 0-.5, 0-5, 0-50 mR/hr 0-500, 0-5,000, 0-50,000 CPM or 0-500 µSv/hr 0-50 mR/hr. Range Switch X1, X10, X100, Battery Check. Accuracy Typically ±15% of reading (referenced to Cs-137) Audio 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 M4: 178 grams (6.3 oz.) without battery 4EC: 198.1 grams (7 oz.) without battery Size 145 x 72 x 38 mm (5.7 x 2.8 x 1.5 in.) Warranty 1 year limited warranty
