Low flow air sampler

Abstract

The present invention discloses a low flow air sampler, which comprises a main box, a sampling pipe and the like, wherein the sampling pipe comprises a sampling cap, a cutting head, a sampling chamber and a sampling column for entrapping air particulates having the diameter of more than a preset equivalent diameter, capturing the currently-sampled air particulates, and synchronously collecting a gas-state sample, and the main box comprises a housing, a direct current power supply, a LCD display screen, a flow meter, a flow rate control device for controlling and adjusting the current sampling flow rate, and a main control circuit for controlling the flow rate control device to adjust the current sampling flow rate according to the set sampling conditions so as to control the sampling pipe to perform air sampling. According to the present invention, the air particulates and the gas-state sample can be synchronously collected, wherein the air particulate samples with different equivalent diameters can be screened and collected by controlling the flow rate, selecting the cutting heads with different pore sizes, and replacing the filtration membranes with different pore sizes while the gas-state sample is synchronously collected by using the capturing column, and the sampling functions such as wind direction setting, wind speed setting, temperature setting, humidity setting and the like are provided.

Description

technical field [0001] The present invention relates to a low flow air sampler. Background technique [0002] With the rapid development of the economy and the improvement of the level of industrialization, the pollution of the atmospheric environment is becoming more and more serious, and the impact on human health is also increasing. Therefore, higher and higher requirements are put forward for the sampling function of air samplers, such as the technical requirements for the simultaneous collection of particle quantity, quality, composition and gas composition during the collection of atmospheric samples. [0003] At present, there are mainly two types of air samplers, active and passive. Active samplers are divided into two types: particulate sample samplers and gaseous sample samplers. The common impact samplers, virtual samplers, and cyclone samplers are all active air particulate sample samplers. This type of sampler is mainly selected Filter membranes of different m...

AI Technical Summary

Problems solved by technology

The collected gaseous samples will carry air particles, which will affect the analysis of gas components

Passive sampler, also known as pumpless sampler, has a simple structure and does not require any power supply. It is suitable for long-term unattended environmental sampling in the field, but passive sampling is easily affected by environmental factors, such as wind direction, wind speed, temperature and Due to the influence of humidity and other factors, there will be space-time errors in sample collection, and its application range is limited.

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