[High Precision]Liquid water flow control meter, measurement accuracy is better than plus or minus 1%; linearity and repeatability 0.2%; reading rate >0.6 ft/s; response time 9999 seconds; speed ±0.03 ±105 ft/s ( ±0.01 ±32 m/s), bidirectional. S=small (DN15-100mm); M=medium (DN50-700mm); L=large (DN300-6000mm). [24KB Data Storage with Password Protection]:Features 24k bytes of data logger space storing about 2000 lines of measurement data with password protection preventing data loss or modification even when the machine is powered down [External Clamp-On Design for Easy Installation]:As a portable clamp on flowmeter it clamps onto existing pipes without cutting or modification making installation faster and less disruptive than inline flow meters for factory or shop use [Complete Kit with All Accessories Included]:This clip on ultrasonic flow meter comes as a complete kit including flowmeter S1/M2/TL1 (One of them)transducer signal cable fastening chain charger ruler carrying case coupling agent and English manual for easy setup [Wide Application Across Multiple Pipe Types]:Works on copper and PVC pipes to detect flow of seawater alcohol river water industrial sewage lubricating oil diesel and fuel oil making this portable clamp on flowmeter versatile for various industrial settings