INSTRUMENT FOR MEASURING DUST

摘要

PURPOSE:To prevent sticking of dust in a gas sampling pipe and to make exact measurement by providing a destaticizing device around said pipe. CONSTITUTION:Cleaned air is blown by a blower 12 through an introducing piping 13 and a filter 14 into a material 11 to be measured in a measuring chamber 10. The air including the dust generated from the material 11 is discharged through a bell mouse reducer 15 to a discharge piping 16. Part of the air in the piping 16 is sampled by the sampling pipe 3 and the concn. of the dust is counted by a measuring instrument 2. The destaticizer 4 is provided around the sampling pipe 3 so that the static electricity in the sampling pipe is removed. Then, the dust is no longer stuck to the inside of the pipe and the measurement is exactly carried out.