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Model : PDM-122
Hãng sản xuất  : RPD
PDM-122 Electronic Pocket Dosimeter - µSv.
The PDM-122 Electronic Pocket Dosimeter is a highly sensitive, compact dosimeter to measure gamma and X-rays.  This direct-reading dosimeter displays an accumulated dose as well as dose rate, and is suitable for measuring above 100 kVp of X-ray tube voltage.
Features
• Light and compact to fit in a pocket
• Wide measurement range from 1µSv to 10 Sv
• Accumulated dose and dose rate measuring
• Data holding function
• Simple operation of only one button
PDM-122 Electronic Pocket Dosimeter Includes
(1)  Battery
(1)  Strap
(1)  Instruction manual
(1)  Calibration certificate
(1)  Inspection certificate 
Specifications
Radiation Detected:  Gamma and X-ray
Energy Threshold:  40 KeV
Detector:  Silicon semiconductor
Measurement Range: 
Dose:  1µSv to 10 Sv 
Dose Rate:  1µSv/h to 1Sv/h
Accuracy:  Within ± 10% 10µSv to 10 Sv; Calibrated by 137Cs using slab phantom
Power:  One CR2450 Lithium Battery (conforming to IEC60086-2) 
Battery Life:  Approx. 700 hrs of continuous use (at room temp 20° C) 
Environmental Requirements:  -10° to +50° C: relative humidity up to 90% non-condensing
Dimensions:  30 W x 11 D x 108 H mm excluding clip
Weight:  40 g
Please Note:  Nonconforming battery may cause a malfunction of the instrument