Feature 1INTELLIGENT ALARM: Enter the alarm setting option and set the current dose alarm value and cumulative dose alarm value. Whether the detector screen is in a sleep or working state, if the detected radiation dose exceeds the alarm threshold, the radiation monitor will automatically alarm. 23 ALARM MODES: There are three alarm modes to choose from, light, vibration, and sound. You can choose the most suitable one for your daily life. 3APPLICATION FIELD: Radiation detectors are widely used in environments with ionizing radiation. Such as home installed radiation, geological survey, iron, testing vehicles, nuclear power plants, industry, radiology, radiology laboratories, etc. 4GM COUNTER: Nuclear radiation monitor is used to detect ionizing radiation ( The strength of particles, gamma rays, and x rays. Use a gas tube or small chamber as the probe. When the voltage applied to the probe reaches a certain range. Each time a ray ionizes in a tube, it produces a pair of ions that can be amplified to produce an electrical pulse of the same size. And recorded by the connected electronic device. From this, the number of rays per unit of time is measured. 5EASY CARRYING: Comes with a small size and being light in weight as well, this nuclear radiation tester is easy to carry for convenient use.Item Type: Radiation DetectorMode: NR 750Material: ABS 1. Detection Ray: , X and hard radial2. Detector: Energy compensated GM tube (Geiger counter tube), with improved low energy response.3. Normal content standard within 0.5uSv/h4. Measurement Range a, Dose Equivalent Rate: 0.00 to 1000 Sv/h (maximum 10mSv/h) b, cumulative dose equivalent: 0.00 Sv to 500.0mSv5. Energy Response: 48KeV to 1.5MeV less than or equal to 30% (for 137Cs -)6. Relative Inherent Error: Model NR 750 less than or equal to 15% (137CS1mSv/h)7. Sensitivity: 80CPM/uSv/h (for Co 60)8. Alarm Threshold:a. Dose Rate: Within 0.5, 1.0, 1.5, 2.0, 2.5, 5.0, 10.0, 50.0, 100.0 Sv/h arbitrary selectionb. Accumulated Dose: Selected from 0.05, 0.5, 1.0, 2.0, 5.0, 10.0, 20.0, 50.0, and 100.0mSv9. Measurement Display: Dose rate displayed per second, protective alarm response less than 5 seconds10. Usage Environment: Temperature -10 to +45 Relative Humidity: Less than or equal to 95% (+45 )Battery: AA x 2 (shipped without battery) Package List: 1 x Tester 1 x Manual