| 摘要 |
PROBLEM TO BE SOLVED: To provide a reliable dust monitor. SOLUTION: In this dust monitor, a lower part of a pump 3 is installed with a pump fixing plate 32, the four corners of the pump fixing plate 32 are installed with pump support legs 33, and a dust monitor base 1a is formed with through-holes 11 corresponding to positions of the support legs 33. A dimension of the through-hole 11 is set to a dimension not allowing contact of the support leg 33 with the base 1a in an inserting state of the support leg 33 through the through-hole 11, while a length of the support leg 33 is set to be longer than a height of the base 1a. Thereby, the pump 3 and the base 1a are independently mounted on a mounting face when the dust monitor is mounted on the mounting face.
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