... Easy installation and maintain.anti-interfere, anti-impurity, anti-acid, corrosion resistant, portability. Specifications:A,SBL digital flow meter ... installation and maintain.13,anti-interfere, anti-impurity, anti-acid, corrosion resistant, portability Technical data:Nominal Diameter:6-4000mmNominal ... .6N li batter,(lifetime 1~2 years),external power supply of 24VDCOutput forms:4-20mA;pulse,0-10V;RS232 ...