Feature: 1. Intelligent Alarm: Supports current dose and cumulative dose alarm value setting. Whether in sleep or working mode, if radiation dose exceeds the threshold, it will automatically alarm, with light, vibration, and sound alarm modes. 2. Geiger Counter Tube: This radiation detector uses energy compensation Geiger counter tube to detect the strength of ionizing radiation (β particles, γ rays and X rays), improves low energy response. 3. Working Principle: Using a gas tube or small chamber as a probe, when the voltage applied to the probe reaches a certain range, a pair of ions are generated and amplified to generate electrical pulses of the same size. 4. Portable Design: The radiation dose monitor is a handheld design that is easy to operate and carry, equipped with a LCD display, clear and intuitive, and can be connected to electronic devices. 5. Applicable Fields: Widely used in environments with ionizing radiation, such as home improvement radiation, geological survey, inspection vehicle, nuclear power plant, industrial application, radiology, laboratory, etc. Specification: Item Type: Radiation Detector Model: NR-850 Detection Ray: γ, X and hard β rays Detector: Energy compensated Geiger counter tube, improved low energy response Normal Content Standard: Within 0.5uSv/h Measurement Range: Dose Equivalent Rate: 0.00-1000μSv/h (maximum 10mSv/h) Cumulative Dose Equivalent: 0.00μSv-500.0mSv Energy Response: 48KeV-1.5MeV ≤±30% (for 137Cs-) Relative Inherent Error: NR-850 Type, ≤±10% (137CS1mSv/h) Sensitivity: 80CPM/uSv/h (for Co-60) Alarm Threshold: Dose Rate: 0.5, 1.0, 1.5, 2.0, 2.5, 5.0, 10.0, 50.0, 100.0μSv/h arbitrary selection Cumulative Dose: 0.05, 0.5, 1.0, 2.0, 5.0, 10.0, 20.0, 50.0, 100.0mSv arbitrary selection Measurement Display: Dose rate displayed per second, protective alarm response less than 5 seconds Usage Environment: Temperature -10℃-45℃, Relative Humidity: ≤95% (+45℃) Battery: 2 x AA Battery (battery not included). Package List: 1 x Radiation Detector1 x User Manual