... 1. Main Technical Parameters(1) Particle size channel 0.3,0.5,1,3,5,10(um)(2) Sampling period 1 ... ~10mins(3) Number of sampling point 2~9(4) Sampling frequency ... 2~9(5) Sampling quantity 2 ... device, and insert the other end in the sampling port, when the 0.5um display figure approaches ...