光电粒子计数器是用于大气中直接测量气溶胶粒子的仪器。本文叙述了一种光电粒子计数器的结构和新的计数原理,该仪器利用PC微机,采用A/D数据采集技术和信号处理软件替代传统的电路功能,具有测量迅速直观、数据自动存储、可自动化测量和数据现场分析等优点。文中给出在西藏和合肥郊区用该仪器得到的一组测量结果。 Photoelectric particle counter is used for direct measurement of aerosol particles in the atmosphere of the instrument. This paper describes the structure of a photoelectric particle counter and a new counting principle. The instrument uses PC microcomputer, using A / D data acquisition technology and signal processing software to replace the traditional circuit functions, with the measurement quickly and intuitively, the data is automatically stored and can be automated Measurement and data analysis and other advantages. The paper gives a set of measurement results obtained by this instrument in the suburbs of Tibet and Hefei.