1. Introduction 
 QC-2-type air sampler was used to collect atmospheric environment or the working environment in the conventional gas sample apparatus, which consists of two suction pump gas, respectively, to form an independent system, simultaneous acquisition of two gas samples or samples collected balance, is the sampling fast and reliable. Can be widely used in metallurgy, mining, chemical, construction, casting, power and environmental monitoring, health and epidemic prevention departments, the sampler with electronic timing and pace of compact, small, stable and reliable, is currently sampling the atmosphere the ideal product. Meanwhile, the QC-2A-type air sampler using a powerful pump pumping pumps, thus overcoming the resistance of larger, more convenient sampling. 
 2. Technical parameters 
 a. pumping performance: ≥ 1L/min 
 b. Flow rate :0.1-1 .5L/min 
 c. flow stability: ≤ 5% 
 d. flow error: ≤ 5% 
 e. Timing range :1-99min 
 f. Timing Error: <0.1% 
 g. Operating temperature: -10-40 ℃ 
 h. Continuous working time: more than 6 hours of battery 
 i. Host Dimension: 210 × 125 × 95mm 
 j. Weight (with battery): 2.8kg 
 3. Instrument configuration 
 a. host sampler 
 b. Power Line 
 c. absorption bottle shelf 
 d. Buffer bottle (safety bottle) 
 e. Tripod 
 f. Manual 
 g. Certificate 
 h. box