... size from DN15mm to DN6000mm, ISO Certificate Handheld Ultrasonic Flow meter TUF-2000H High Accuracy measuringAccuracy: ±1%, ... hours of continuous operation Large LCD displayDisplay instantaneous flow, accumulated flow (positive, negative and net), velocity, ... -digit totals for net, positive and negative flow respectivelyLiquid TypesVirtually all liquidsSecuritySetup values Modification Lockout. ...