Leumann & Uhlmann AG

ZD Instrument Co. (Jiangyan ZhengDa Scientific Education Instrument & Equipment Factory) is a speciallized manufacturer of electro-chemistry instruments. Our main products are pH meters, conductivity meters, "Nutra Wand" conductivity meters, mini TDS

The Herbert Schümann GmbH has its headquarters in Stadtallendorf in Hessen. The Papierverarbeitungswerk was founded in 1920 in Berlin and is now one of the leading manufacturers in the industry.