Our company sell Ultrasonic Flow meter ,Portable Ultrasonic Flow Meter ,Pannel-Mount Ultrasonic Flow Meter, Hand-Held Ultrasonic Flow Meter ,ultrasonic water meter, Wall-mount clamp-on Ultrasonic Flow Meter ,Ultrasonic Thickness Meter ,Hardness Tester , Sound level meter Vibration Meter, Lux meter , Moisture Meter , Surface Roughness Tester . we are the factory in Dalian