Airgas flowmeters feature an easy-to-read, universal millimeter scale, permanently etched onto a heavy glass flow tube. This scale permits measurement of a wide range of gases and fluids under a variety of pressure and temperature conditions. Simply refer to the calibration curve to interpret the flow reading. The brass and stainless steel units feature a 1.5 focal power magnifying front cover that allows for a more accurate tube reading. These flowmeters contain dual floats--each constructed of a different material-- which provide you with a 20:1 readout range, versus the industry standard of 10:1. Each flowmeter is equipped with two panel-mount retaining nuts to simplify industrial panel mounting, or you may purchase an optional tripod base for easy bench setup in laboratory applications. pipe-to-tubing or pipe-to-hose adapters are also available.