HANDHELD NUCLEAR RADIATION DETECTOR:HFS-10 is a portable and accurate nuclear Radiation Detector with built-in GM sensors, fast response and high accurate. mainly used for monitoring X, β and γ rays.measure range: 0.05uSv-50mSv,Measure precision: -17%...+25% based on 137Csγ, standby for 20 days TWO MEASURING MODE:Digital geiger counter has real-time data update and timed detection function,you can set the "Measurement Time" range from 0 to 999 hours, and can save the historical record information of the last 10 measurements. INTELLIGENT ALARM:Enter the alarm setting option to set the dose rate alarm value. Whether the detector screen is in sleep state or in operation, Alerts users via audio and visual alarms when preset thresholds are exceeded. MULTIFUNCTIONAL GEIGER COUNTER: Our the geiger counter has other various setting, such as timing measure function, delete setting, sound setting, calendar clock function, able to guarantee the clock normally running after power off, sleep setting and unit setting & language change, Easy one-handed operation APPLICATION AREAS: Widely applied in the environment where existing ionize radiation. Such as home improvement radiation, geological survey, iron, Inspection vehicles, irradiation processing enterprises, health epidemic prevention, industry, radiology, radiology laboratories and so on