Main features A. Single chip technology, powerful function, high accuracy. B. Lithium battery for energy source, as long as two years or longer. C. Instant flow and total flow are easily showed on the screen, and all the data will be remembered for more than ten years though the product powered off. D. Simple structure, easy installation, operation and maintenance. And password protection. E. Data is amended automatically and high accuracy. F. Clear in reading, simple operation and maintenance. G. Explosion-proof. Main technology parameters Accuracy: ¡¾0.2% ¡¾0.5% ¡¾1.0% Caliber: dn15~dn500mm Pressure: 1.6~6.3mpa. ¡ã10mpa Measurement range: 0.4~4000m©ø/h Connection type: thread connection (dn15~dn40mm) flange connection(dn15~dn500mm) Energy source: 1) a lithium battery inside- no output; 2) 24vdc outside- 4~20ma output Explosion-proof grade: exd¥±bt5 Individual in polybags, inner plastic boxes, out plywood cartons(wood cartons), any special required packings can be specified as well(customization).