Air radioactive monitoring devices can be classified based on multiple dimensions such as monitoring objects, usage scenarios, technical principles, functional characteristics, and portability. The following is a detailed introduction:
1、 Classified by monitoring objects
Total radioactive monitoring instrument:
Function: Measure the total activity or total dose rate of all radioactive particles in the air, without distinguishing specific types.
Application scenario: Suitable for situations that require rapid assessment of overall radioactivity levels, such as environmental monitoring around nuclear facilities, emergency response to nuclear accidents, etc.
Specific type of radiation monitoring device:
Alpha Ray Monitor:
Function: Specifically detecting alpha particles in the air (such as alpha particles produced by radon decay).
Application scenarios: Used for uranium mining areas, radon rich areas, or indoor air quality monitoring.
Beta Ray Monitor:
Function: Detect beta particles in the air (such as beta particles produced by the decay of strontium-90, cesium-137, etc.).
Application scenarios: Surrounding areas of nuclear power plants, medical radioactive waste disposal sites, etc.
Gamma ray monitoring device:
Function: Measure the gamma ray dose rate in the air and reflect the total amount of radioactive material.
Application scenarios: Widely used in the nuclear energy industry, environmental monitoring, public safety, and other fields.
Neutron monitoring device:
Function: Detect neutron flow in the air, suitable for places such as nuclear reactors and particle accelerators.
Application scenarios: nuclear research facilities, nuclear fuel cycle facilities, etc.
Radioactive aerosol monitoring device:
Function: Specifically detecting suspended radioactive aerosol particles in the air (such as iodides, uranium compounds, etc.).
Application scenarios: nuclear power plant ventilation systems, nuclear waste disposal sites, post nuclear accident air purification monitoring, etc.
2、 Classified by usage scenario
Fixed monitoring device:
Features: Long term installation in fixed positions, supporting multi probe linkage, and data networking transmission (such as RS485, GPRS, 4G/5G).
Application scenarios: nuclear power plants, nuclear waste treatment plants, laboratories, industrial testing sites, and other places that require long-term continuous monitoring.
Portable monitoring device:
Features: Lightweight design, battery powered, supports one handed operation, with data storage and wireless transmission capabilities.
Application scenarios: nuclear accident emergency response, on-site investigation, temporary monitoring point setting, and other situations that require flexible movement.
Vehicle/onboard monitoring device:
Features: Installed on vehicles or aircraft, used for rapid scanning and monitoring of large areas.
Application scenarios: assessment of contaminated areas after nuclear accidents, investigation of environmental radioactive background, etc.
3、 Classified by technical principles
Ionizing chamber type monitoring instrument:
Principle: Measure ionization current or charge by utilizing the ionization effect generated by radioactive particles in an ionization chamber.
Characteristics: Wide measurement range, good stability, but relatively low sensitivity.
Application scenarios: High dose rate environmental monitoring, such as the main control room of nuclear power plants, reactor surroundings, etc.
Scintillation detector type monitoring instrument:
Principle: Radioactive particles interact with scintillators to produce fluorescence, which is converted into electrical signals through photomultiplier tubes.
Features: High sensitivity, able to distinguish different types of radiation, but complex structure and high cost.
Application scenarios: Low dose rate environmental monitoring, such as environmental radioactive background investigation, medical facility monitoring, etc.
Semiconductor detector type monitoring instrument:
Principle: Use the electron hole pairs generated by radioactive particles in semiconductor materials to measure changes in charge.
Features: High resolution, capable of measuring energy spectra, but easily affected by temperature.
Application scenarios: Energy spectrum analysis, such as nuclide identification, radioactive material composition analysis, etc.
GM Counting Tube Monitor:
Principle: Use the gas discharge effect generated by radioactive particles in the GM counter tube to measure the number of discharges.
Features: Simple structure, low cost, but can only measure the total count rate and cannot distinguish the type of radiation.
Application scenarios: Fast and rough monitoring, such as personal dose monitoring, on-site rapid screening, etc.
4、 Classified by functional characteristics
Intelligent monitoring device:
Features: Integrated AI algorithm, capable of predicting the trend of radioactive substance concentration changes and providing management recommendations; Support remote monitoring and data analysis.
Application scenarios: occasions that require intelligent management, such as smart city environmental monitoring, remote monitoring of nuclear facilities, etc.
Multi parameter monitoring instrument:
Features: It can simultaneously measure multiple parameters such as temperature, humidity, air pressure, wind speed, as well as radioactive levels.
Application scenario: occasions that require comprehensive environmental parameter monitoring, such as nuclear accident emergency response, environmental impact assessment, etc.
Explosion proof monitoring device:
Features: Equipped with explosion-proof design, suitable for flammable and explosive environments.
Application scenarios: Areas with explosion risks such as oil extraction and chemical sites.
5、 Classified by portability
Handheld monitoring device:
Features: Small size, light weight, easy to carry and operate.
Application scenarios: personal dose monitoring, on-site rapid screening, emergency response, etc.
2. Backpack type monitoring device:
Features: Can be carried and used, suitable for long-term field operations.
Application scenarios: Environmental radioactive background investigation, assessment of contaminated areas after nuclear accidents, etc.
Wearable monitoring device:
Features: Can be worn on the body, such as wristwatch style, badge style, etc.
Application scenarios: personal dose monitoring, occupational exposure assessment, etc.