The HFS-20 is a nuclear radiation detection instrument used to detect radiation levels and warn of radiation hazards. Specifically: 1. CT/X/Y-rays: The HFS-20 can detect radiation from CT scanning equipment as well as X-rays and Y-rays. It can monitor the radiation intensity of these rays to ensure that the radiation level meets safety standards. 2. Radioactive personal dose alarm: HFS-20 can use personal dose alarm to monitor the radiation dose received by individuals. This kind of alarm can be worn on the human body, monitor the radiation level in the surrounding environment, and send out an alarm when the warning value is reached, so as to protect individuals from radiation hazards. 3. Counter: HFS-20 also has a counter function to measure and record the radiation dose or pollutant particles released by the radiation source. The counters provide real-time radiation counts and can record and analyze data to better assess radiation risks. These features make the HFS-20 a widely used instrument in the field of radiation detection and protection to ensure the safety of workplaces, medical equipment and environments.