Bio tech aggressive chemical low flow flowmeter 0 05 to 3 0 l min bio tech fch m pp lc a flow meter that is designed for measuring very small quantities of chemically aggressive aqueous and viscous substances the materials used are highly resistant to aggressive substances the magnets are hermetically sealed the contactless sensor system ensures an almost unlimited lifetime and generates fully conditioned square wave pulse signals e g for the plc br br for use with chemically a