KIRIYAMA RHOTO (Kiriyama Funnel)* is a long-selling laboratory glass filter for vacuum filtration that has been used by research and development institutions worldwide since its introduction in 1964. Inspired by the design of a manhole cover, its unique structure features a single central opening and circumferential grooves, making it easy to clean while helping reduce residue and contamination. Made of fully transparent, heat-resistant glass, the funnel allows users to observe the filtration process. It is available in funnel diameters ranging from 8 mm to 185 mm, and the RHOTO 55 (55 mm), RHOTO 150 (150 mm), and RHOTO 185 (185 mm) models are compatible with commercially available filter paper. Widely used in the chemical, pharmaceutical, food, and cosmetics industries, as well as universities and research institutions, the Kiriyama Funnel supports day-to-day laboratory work.
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