CM Flowmeters [India] Private Limited manufactures Anesthetic Air Rotameters. CM Flowmeters [India] Private Limited is an ISO 9001:2000 certified company. The Anesthetic Air Rotameters are calibrated for 0.2-15 L/min Air at 20 Deg C / 1013 mbar abs. The Anesthetic Air Rotameters give a highly accurate and reliable indication of gas flow rates in anesthesia machines. The anesthetic rota meters generally conform to Indian and International Standard specifications for Continuous Flow Inhalation Anesthetic Apparatus [Anesthetic Machines] for Use with Humans, i.E. ISO 5358. CM Flow meters [India] Pvt. Ltd. Products bear the brand "CM", which enjoys a very good market reputation.