On-line aerosol detector

The invention discloses an on-line aerosol detector comprising a replaceable filter paper sampler, a radioactive particle detector and a detector housing. The replaceable filter paper sampler is arranged at the lower part of the radioactive particle detector and, together with the radioactive particle detector, is arranged in the detector housing. The detector housing has a structure based on a dual-layer design. According to the invention, on-line quick detection of a small amount of artificial radioactive aerosol released to the atmospheric environment under the condition of slight leakage of nuclear facilities or at an initial stage of leakage is realized; the important scientific data are provided for the nuclear safety and nuclear emergency; and thus the on-line aerosol detector has an important practical value in fields of nuclear power plants and various nuclear facilities. 本发明公开了种气溶胶在线探测器，所述探测器包括：可更换式滤纸采样器、放射性粒子探测器及探测器外壳；所述可更换式滤纸采样器设置在所述放射性粒子探测器的下部，并连同放射性粒子探测器设置在探测器外壳内；所述探测器外壳结构为双层设计。本发明可以用于对核设施轻微泄漏或者