Midori Anzen Co., Ltd.

Yukihiro Nakata

Takeshi Yamada

Naoki Sugita

Yutaka Hatta

Nozzle openings each including a straight duct portion and a tapered portion are situated at an upstream position of an air flow with respect to the straight duct portion. The nozzle openings are formed in a nozzle plate such that the nozzle openings are arranged in grid, and airborne microorganisms passing through the nozzle plate can be effectively collected to form colonies. A degree of cleanness is measured by counting the colonies visually.

Portable air-borne bacteria sampler

After supporting a petri dish S having a culture medium K contained therein with a given thickness on a petri dish holder of a housing , a nozzle holder is clamped at a top of the housing . When a motor is energized to rotate a high static pressure fan , air is introduced through nozzle openings , and flows through a space between the nozzle and the culture medium K. By setting a distance between the nozzle and the culture medium to 0.5-1.5 mm, a high collection efficiency can be attained.

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Tokyo, Japan

Yukihiro Nakata