... instrument blocked, the instruments still emits continuous sound-light alarm. This instrument is of low consumption, many functions, ... and portable, it widely used in industrial NDT, nuclear power station, nuclear submarine, isotope application, cobalt therapy in hospital ... 10mR/h, instrument will continuous sound-light alarm.Power supply: two 7# battery,power dissipation < 1mwDimension: 88×44×24(mm) ...