Feature:    1. MAIN PURPOSE: Handheld nuclear radiation detector with high accuracy and sensitivity, measuring range is 0.05uSv& 8209;50mSv, can be used to monitor X, β and y rays. 2. GOOD PERFORMANCE: The microprocessor with powerful performance is selected and equipped with a TFT2.0 color screen, which is easy to operate and has less interference. 3. ALARM METHOD: Arbitrary combination of sound and flash alarm methods, and the alarm threshold can be set arbitrarily, when the threshold is reached, an alarm will be issued in time. 4. MULTIPLE FUNCTIONS: With real time monitoring, automatic over standard alarm and fault self checking function, support timing measurement, can be set arbitrarily between 00& 8209;999 hours. 5. APPLICABLE SCENES: Widely used in home improvement radiation, nuclear laboratory, petrochemical, geological census, radiation dose supervision and protection for individuals. Specification: Item Type: Nuclear Radiation Detector Model: PTL816 Material: ABS Battery: Rechargeable lithium battery 3.7V 1500mAh (built in battery) Application: Nuclear radiation detection alarm Scope of Application: Home improvement radiation, irradiation processing enterprises, health and epidemic prevention, radiotherapy, nuclear laboratories, nuclear power plants, import and export commodity inspection, building materials, petrochemicals, geological censuses, scrap iron and steel, industrial non destructive testing, etc. Under the environment of ionizing radiation, personal acceptance radiation dose supervision and protection situations. Sensor: GM counter tube Measuring Range: 0.05uSv-50mSv Measurement Accuracy: -17%-+25% based on 137CsY Battery Life: 20 days (continuous measurement, no particle sound) Charging Interface: TYPE-C Interface (green light is always on when charging, full off) Alarm Response Time Td: <10s Alarm Threshold Deviation: -17%-+25% Instantaneous Value Measurement Range: 0.05uSv-50mSv Average Measurement Range: 0.05uSv-50mSv Cumulative Dose Value Range: 0.1uSv-9999mSv Function:  1. The dose rate is measured in real time, and the cumulative dose is recorded at the same time. 2. With calibration function. 3. Dose rate alarm threshold and metering alarm threshold can be set arbitrarily (continuous adjustment). 4. The starting time of the current dose accumulation can be viewed. 5. With timing measurement function, it can be set arbitrarily between 00-999 hours. 6. With over dose alarm function. 7. The history record information of the last 10 measurements can be saved. 8. With calendar clock function, it can ensure the normal operation of the clock after shutdown. 9. The battery level is continuously monitored with a battery level icon. 10. Free switching between Chinese and English menus. 11. With sensor failure prompt function (display shows device is damaged) 12. When the recorder is turned on and the screen is off, if it detects that the radiation dose exceeds the set alarm value, the monitor will automatically alarm. It will automatically jump to the radiation measurement page. 1.