Description: 【Nuclear Radiation Detector】Geiger counter nuclear radiation detector with built in sensor, fast response time and high accuracy, able to detect Gamma, Beta and X . Cumulative dose equivalent: 0.00~1000μsv/h(10mSv/h). 【Alarm】Enter the alarm setting option to set the current dose alarm value and the accumulated dose alarm value. Whether the detector screen is state or in operation,the radiation dose detected exceeds the alarm threshold,the radiation monitor will automatically alarm. Light/Vibration/Sound 3 combined alarm modes to choose. 【Multifunctional Geiger Counter】Our the geiger counter has other various setting, such as alarm setting, system clock setting and unit setting & language change. Easy handed operation. 【Working Principle】Uses a Geiger Miller counter.Counter for detecting the intensity of ionizing radiation (Beta particles, Gamma and x ).Use a gas tube or a small chamber as a probe.When the voltage applied to the probe reaches a certain range.Each time is ionized to produce a pair of ions, it can be amplified to produce an electric of the same size.And recorded by the connected electronic The number of time thus measured. 【Application Areas】Widely applied in the environment where existing ionize radiation. Such as home improvement radiation, geological survey, iron, Inspection vehicles, nuclear power plants, industry, radiology, radiology laboratories and so on Specification: Dose Current Rate: 0.00-1000μsv/h (10mSv/h) Size Chart: 12cmx7.8cmx2.7cm/4.72inchx3.07inchx1.06inch Package Includes: 1 Geiger Counter 1 USB Cable Note: Please allow slightly errors due to manual measurement and different monitors.