The ZHK2507 portable high flow aerosol sampler is mainly used to collect aerosol samples in ambient air. Its working principle is based on aerodynamics and particle separation technology. By precisely controlling the sampling process, it achieves effective collection of aerosol particles in the air. The core working principle can be divided into the following steps:
1. Air inhalation and particle separation
The portable aerosol sampler generates negative pressure through a built-in suction pump and draws ambient air into the sampling system. The air first passes through a cutting head (also known as a particle size separator), which separates the particles in the air according to the set particle size range based on aerodynamic principles. For example, PM2.5 cutting heads can separate particles with aerodynamic diameters less than or equal to 2.5 microns in the air, while PM10 cutting heads are used to separate particles with diameters less than or equal to 10 microns.
2. Particulate matter collection
The particles separated by the cutting head are collected on a filter membrane or other medium. Filter membranes are usually made of materials such as glass fiber and polytetrafluoroethylene (PTFE), which have efficient particle capture capabilities. During the sampling process, particulate matter is uniformly deposited on the surface of the filter membrane, forming a sample that can be used for subsequent analysis.
3. Flow control and monitoring
The flow control system of the sampler ensures the stability and accuracy of the sampling process. The built-in flow sensor and controller of the device can adjust the sampling flow in real time, usually controlling the flow at a constant value. The accuracy of flow control directly affects the reliability of sampling results, so modern samplers are usually equipped with high-precision flow calibration systems, with errors controlled within ± 5%.
4. Data recording and storage
Portable aerosol samplers are usually equipped with intelligent operating systems that can record key parameters during the sampling process in real time, such as sampling time, sampling flow rate, temperature, humidity, etc. These data are stored inside the device and can be exported through USB interface or wireless transmission for subsequent analysis and report generation.
5. Power supply and portability
The device is powered by rechargeable lithium batteries and supports long-term continuous operation. Its lightweight design and portability make it easy to carry the sampler to different locations for on-site sampling, suitable for various scenarios such as outdoor environmental monitoring and industrial site inspection.
summarize
The working principle of a portable aerosol sampler is to suck in air through an air pump, separate particles of specific sizes using a cutting head, and collect them on a filter membrane. Ensure the accuracy and reliability of the sampling process through precise flow control and data recording.
