... to the product of flux density B,measuring tube diameter D and average velocity V,that's: E BVD. Electromotive ... counters,which can separately show positive cumulation,reverse cumulation and D-value calculation;7.With RS485 or RS232 digital communication signal ... 15,Tongjia Industrial Park,Changzhou,Jiangsu Prov.,ChinaWebsite:www.qf-meter.comSkype:vicky_china68 Tel:+86-519-85327611 Fax:+86-519-85505269 ...