FNIRSI GC-01 Dosimeter Radiation Detector - Dosimeter Radiation Detector: FNIRSI GC-01 Geiger counter nuclear radiation detector with built-in GM sensor, fast response time and high accuracy, capable of detecting gamma, beta and X-rays. Cumulative equivalent dose: 0.00uSv-500.0mSv. Energy range: 48KeV-1.5MeV ≤ ± 30% (for 137Csγ). - Intelligent alarm: Set the current dose alarm value and cumulative dose alarm value using the alarm setting option. The radiation monitor automatically sounds an alarm when the detected radiation dose exceeds the alarm limit, regardless of whether the screen is at rest or in operation. Alarm options include light, vibration, and sound. Three combined alarm modes are available. - Multifunctional Geiger Counter: Features include alarm setting, system clock setting, unit setting, and voice switching. Operation supports English (default) or Chinese. Designed for easy one-handed use. - Working Principle: The device measures ionizing radiation (beta particles, gamma rays and X-rays) using a Geiger Miller counter. A gas tube or small chamber serves as the probe. When the applied voltage reaches the operating range, each ionization event within the tube creates an ion pair, which is amplified to produce an electrical pulse of the same size. - Practical applications: Ideal for field radiation surveys, laboratory safety monitoring, industrial radiography, environmental radiation monitoring, and home or emergency preparedness scenarios.