... flowmeter/flowmeterHand Hold Ultrasonic Flow Meter Linearity0.5%Repeatability0.2%Accuracy±1% of reading at rates>0.6 ft/s. ±0.5 ... ±30 m/s), bidirectionalPipe Size15mm 6,000mmRate UnitsMeter, Feet, Cubic Meter, Liter, Cubic Feet, USA Gallon, Imperial Gallon, Oil Barrel, USA ... Weight1.2 lbs (514g) with batteries Hand Hold Ultrasonic Flow Meter/ultrasonic flowmeter/flowmeter