[High Precision ±1% Measurement Accuracy]: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). [Portable Clamp On Design for Field Work]:Features a portable clamp on flowmeter design with built-in rechargeable battery supporting 12 hours continuous operation and 24k memory storing 2000 rows of data enabling mobile field work without power concerns [Non-Invasive Measurement During Operation]:The clip on ultrasonic flow meter requires no pipeline destruction or production shutdown during measurement with sensors that never contact the measured medium eliminating pressure loss issues [Intuitive LCD Display with Parameterization]:LCD displays instantaneous volume flow rate and signal strength while function keys allow easy parameterization for measuring positive negative and net flow with automatic medium parameter recognition [Wide Application Across Multiple Media & Pipes]:Suitable for seawater clean water alcohol river water hot water industrial sewage diesel fuel oil and chemical liquids in PVC stainless steel cast iron and fiberglass pipe systems