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Variations such as the "7-day recording volumetric spore trap" have been designed for continuous sampling using a slowly rotating drum that deposits impacted material onto a coated plastic tape. The "airborne bacteria sampler" can sample at rates up to 700 LPM, allowing for large samples to be collected in a short sampling time. Biological material is impacted and deposited onto an agar lined Petri dish, allowing cultures to develop.