Bio tech npn non aggressive axial turbine flowmeter bio tech vision 2000 the only 59 x 17 x 31 mm wide measuring turbine is particularly suitable for measuring chemically highly aggressive media such as acids and lyes in the chemical industry and in electroplating for monitoring machine cooling circuits in the laboratory and in other metering technology applications all parts in contact with the medium are made from plastic the integral sensor generates an npn open collector signal bio te