从采样针筒接口、校正系数、放散和分析时间等方面探讨了煤气含苯分析不准确的原因及改进措施，从而提高了煤气含苯分析的准确度。
Discussed the inaccurate analysis of content of the benzene in the gas caused by inacurate sampling connection, correction factor, exhales and and alysis time and gives the improvement measures.
系统采用C8051F单片机作为控制芯片、JN5121模块及瓦斯传感元件，自动记录巡检沿途地点编号、采样时间、瓦斯浓度等信息。
The system uses C8051F monolithic as control chip, JN5121 module and gas sensor, can automatically record inspection locations, sampling time, gas concentration and so on.
还对各工况下的速度采样时间及误差进行了计算和比对。
Moreover calculation and comparison of speed sampling time and error under various working mode are made.
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