The SMART portable clamp-on Ultrasonic Flow Meter from Noncontact Meters is designed to communicate with a smartphone through a downloadable app to monitor gpm rates or totalization in metal or plastic pipe from 2 to 20 inches in diameter. Transit Time technology sends a sound pulse across the pipe and monitors the return differential of the transmit pulse as well as the return time to calculate volumetric flow rate and total. 770/516-3999; www.noncontactmeters.com.