Hengaode analytical dust detector technical principle application field
Dust detector is abbreviated as dust meter, also called dust meter or dust tester, which is mainly used to detect the dust concentration in ambient air. The types of dust meter are divided into: laser dust meter, online continuous monitoring dust meter, portable dust meter, etc. , Dust meter is widely used in disease prevention and control centers, mines, metallurgy, power plants, chemical manufacturing, health supervision, environmental protection, environmental online monitoring and so on.
Technical principles
The working principle of the dust detector is mainly light scattering method, beta ray, AC static induction principle; it is suitable for various research institutions, meteorology, public health, labor hygiene, atmospheric pollution research, etc. There are five main methods of rapid detection instruments: light scattering method, β-ray method and micro-weight balance method, electrostatic induction method, piezoelectric balance method.
Product Series
The series of products on the market are: LD series, explosion-proof dust instrument series, domestic explosion-proof dust instrument, laser dust instrument, etc. Among them, the accuracy and measurement range of these products are also different, the accuracy is 0.01mg / m and 0.001mg / m, The measuring range is 0.01-100mg / m, 0.001-10mg / m.
LD series
The laser dust meter is a compact dust meter with a laser as a light source. It is a fast dust meter that meets the industry standards of the Ministry of Health; more than 1,000 units have been used throughout the country. The instrument is suitable for the rapid determination of the concentration of inhalable particulate matter (PM10) in public places, the detection of dust concentration in labor and hygiene in industrial and mining enterprises, and the monitoring of the concentration of inhalable dust in the field of environmental protection. It can also be used for the purification efficiency of air purifiers. Evaluation. Introduce a full set of manufacturing, testing and calibration technologies and equipment from Japan.
The new microcomputer laser dust detector with built-in filter membrane online sampler can continuously collect the dust sample while monitoring the dust mass concentration, and realize the switch of multiple cutters of PM2.5, PM5, PM10, TSP, PM1
Pipeline series
Dust removal system, the gas-solid two-phase fluid containing dust particles in the transportation process through the pipeline and the dust collector, due to the collision of the dust particles and the dust particles, the dust particles and the inner wall of the pipeline, the dust particles and the filter element, and the dust particles and the flue gas And friction will make the dust particles have electrostatic charge. The amount of electrostatic charge is directly related to the dust content in the gas-solid two-phase fluid in the pipeline, and the arithmetic mean value of the charge and the root mean square value of the disturbance reflect the pipeline Internal dust content. This charge conversion is called electrostatic friction effect, or electrostatic induction.
The online dust detector is specially designed for the process including bag filter system, ceramic filter system or filter element filter system that needs to monitor the change of dust concentration trend. Dust linear emission detection, mainly used in dust emission detection. For the convenience of installation and operation, the sensor and the control unit are placed together in a housing with protection class IP65. Flue dust monitoring is specially designed for environmental protection monitoring and flue dust concentration monitoring, with TUV environmental certification. Safe mode dust meter is used in dangerous areas, equipped with two alarm relays and 4-20mA signal output. The sensor meets Atex certification requirements, II ½ GD EEx ia IIC T6, IP65, T85 ℃. The monitoring system includes EEx sensor, split transmitter, and signal processing unit.
Imported series
The AM personal dust meter is suitable for industrial hygiene and occupational safety, and can display the dust concentration in real time and record the data. Easy to carry, built-in sampling pump, and can choose different channels for sampling according to different needs.
The AM personal dust meter includes a battery status monitor that can display accurate running time. The SP series is a personal air sampling pump suitable for air sampling in industrial hygiene and occupational safety. Can collect dust or gas in the air.
SP series sampling pumps integrate microchip technology to count the battery life in real time and display the running time in minutes. In addition, through simple and clear keyboard input, you can perform simple keyboard programming for sampling, set sampling time, sampling flow rate and so on.
Desktop or handheld, suitable for any environment and application. The new DUSTTRAK II aerosol monitor is composed of battery drive, data recording and light scattering laser photometer, which can give real-time aerosol mass concentration readings. They use a sheath gas system to isolate the aerosol in the optical chamber and keep the optics clean, thereby improving reliability and low maintenance costs. The instrument can be used in a clean office, but also suitable for difficult industrial workshops, construction sites, environmental monitoring and other outdoor environments.
The latest monitor can measure mass concentration and particle size. Automatically record data, and the light scattering laser dust meter can read the aerosol mass concentration in real time. The use of a unique pneumatic system isolates the aerosol and optical chamber to ensure the cleanliness of the optical components, extend their life, and reduce maintenance costs.
Application field
Determination of dust concentration at the production site of industrial and mining enterprises, monitoring of dust concentration at the exhaust port;
Monitoring and enforcement of the concentration of respirable particulate matter in public places by the Centers for Disease Control and Prevention and the Sanitary Supervision Office;
Environmental protection monitoring center for atmospheric dust, PM10, PM2.5, TSP detection, pollution source investigation, etc .;
Field test of filter material performance test, air purification efficiency evaluation;
Where the factory needs clean air, the management of manufacturing processes for precision instruments, test instruments, electronic components, food, medicines, etc .;
Scientific research institutions, colleges and universities, meteorology, public health, industrial labor hygiene engineering, atmospheric pollution research, etc .;
Dust detection in buildings or blasting places; dust exposure monitoring at construction sites and construction sites;
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