RITTER COMPANY Dr.-Ing. Ritter Apparatebau GmbH Coloniastr. 19-23 D-44892 Bochum Germany Tel: +49 234 280077 Fax: +49 234 280078 E.mail: mailbox@ritter-app.com Web: www.ritter-app.com

The German RITTER Company has been manufacturing high-quality laboratory-precision Gas Flow Meters since 1951. We specialise in Drum-type (Wet-test) volumetric Gas Meters made of thermoplastics (PVC, PP, & PVDF & PE electrically conductive) as well as stainless steel (316 L) for use with aggressive gases. The Meters cover a total measuring range of 0.1 l/h to 18,000 l/h with +/- 0.2% accuracy at standard flow rate. We also supply the MilliGascounter’ for the measurement of smallest amounts of gas with ultra-low flow rates (0.1 ml/h to 1.2 l/h), Bellows-type (Dry-test) Gas Meters (40 l/h to 160,000 l/h at +/- 2% accuracy, Cali-5-Bond Gas Sampling Bags which are non-permeable, opaque, chemically inert, robust and have many valve options (sizes range from 0.1 litres to 200 litres), and Laboratory Gasometers for gas storage.