Abstract: A portable, self contained, infusion monitor is disclosed which can be easily and quickly attached to the drip chamber of an IV set. The monitor detects each drop of liquid falling through the drip chamber and calculates the volumetric flow rate of liquid passing through the IV set. A display for visually recording the flow rate is provided on the monitor along with an adjustable control member for calibrating the monitor for use with any IV set employing tubing having any drop factor.