Gamma Sensitivity 3500 CPM/mR/hr referenced to Cs-137. Smallest detectable level for I-125 is .02 µCi at contact. Timer can set 1 minute sampling periods from 1 to 10 minutes. Operating Range mR/hr - .001 (1µR) to 100 mR/hr CPM - 0 to 350,000 µSv/hr - .01 to 1000 CPS - 0 to 5000 Total/ Timer - 1 to 9,999,000 counts Accuracy mR/hr ±10% typical (NIST), ±15% max - 0 to 100 µSv/hr ±10% typical (NIST), ±15% max - 01 - 1000 CPM ±10% typical (NIST), ±15% max - 0 to 350,000 (Referenced to Cs-137) Alert Set Range mR/hr .001 - 50 and CPM 1 - 160,000. 70db @ 1m. Count Light Red LED flashes with each radiation event. Audio Indicator Internally mounted beeper (can be switched off for silent operation) Outputs Dual miniature jack drives CMOS or TTL devices: count to computer or datalogger. Submini jack input allows for electronic calibration 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 2160 hours at normal background. Temperature Range -10ºC to 50ºC (14ºF to 122ºF) Weight Inspector: 275 grams (9.7 oz.) without battery. Size 150 x 80 x 30 mm (5.9 x 3.3 x 1.2 in.). Includes Carrying Case, CE Certification Warranty 1 year limited, 90 day Warranty on GM Detector