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恒温恒流空气采样器是根据世界卫生组织(WHO)所规定的指标而设计的一种采样装置。采样时间由石英钟控制,保证了采样时间的准确。选用不锈钢注射针头作临界孔,使其两端的压力差保持在50kpa以上,在一定温度下,临界孔径不变,从而达到恒流目的,使采样流量稳定准确。采用半导体致冷技术来控制吸收管槽体温度在15℃±5℃。防止了吸收液的蒸发和冻结,这样保证了采样的顺利进行。采样动力选用小型薄膜泵,重量轻,体积小,对采样无污染。该采样器适用于地面监测站和固定采样点的常规采样。可采集空气中SO_2、NO_x、
Constant temperature and constant flow air sampler is based on the World Health Organization (WHO) set the target of a sampling device. Sampling time controlled by the quartz clock, to ensure accurate sampling time. Selection of stainless steel injection needle as a critical hole, so that the pressure difference across the 50kpa maintained at a certain temperature, the critical aperture unchanged, so as to achieve the purpose of constant current, the sample flow rate is stable and accurate. The use of semiconductor cooling technology to control the absorption tube tank temperature at 15 ℃ ± 5 ℃. Prevent the evaporation and freezing of the absorption liquid, thus ensuring the smooth sampling. Sampling power selection of small membrane pumps, light weight, small size, no pollution to the sample. The sampler is suitable for routine sampling of ground stations and fixed sampling points. Can be collected in the air SO_2, NO_x,