EMCO Flow Systems” Sono-Trak Doppler ultrasonic flowmeter is designed for measuring fluids containing suspended particles or bubbles, including agricultural water, hazardous wastes, extremely viscous substances, reservoir outflows, raw sewage, paper pulp and slurries. Supports pipe sizes from two inches to 100 inches. The flowmeter is obstruction-less, produces no associated pressures drops and provides accuracy ratings of +/-2.0 percent of full scale from one ft/sec to 30 ft/sec and repeatability of +/-0.01 percent of rate. The meter”s display reads pulse, voltage and analog rates, as well as provides built-in high/low limit alarms, 4-20-mA signals and an echo light to indicate readings. Its digital signal allows for cable lengths up to 5,000 ft, and the flowmeter provides noise immunity to variable frequency drives (VFD). Rated for temperatures from -40 F to 300 F and a velocity range of 0.1 ft/sec to 50 ft/sec. No moving parts and available in both fixed and portable units.