回旋取样器是为收集流动的液体样品，如河流，下水道等地方的样品而设计的。
由于采样器本身可以回旋，所以允许从不同角度采集样品，包括90度。
可调玻璃纤维杆从1.83m到3.66m自由伸缩，以便抽取样品
装置上有个聚乙烯的采样瓶和有班轮的盖子，连接的地方有个可调节的塑料环调整连接情况。
when collecting a sample from a horizontal flowing stream, such as a sewer, the nasco swing sampler is specially designed for this application!
the end of the sampler swings, allowing collection from different angles, including 90°.
the 6-ft. （1.83 m） adjustable fiberglass pole extends to 12 ft. （3.66 m） providing a long length for any sampling situation.
unit comes with a 960 ml polyethylene bottle and the cover has a vinyl liner for leak-proof protection. the bottle is attached to a polyurethane holder and is held in place with a plastic snapper ring that has an adjustable locking device. other types of bottles may be used but a different type of fastener may be required to hold the bottle in place.