Water flow meter 
Technical Performance Parameters 
Caliber: DN3~DN3000mm 
Nominal Pressure: 0.6~4.0MPa(special pressure can be made to) 
Accuracy: 0.5%, ; 0.3% or 0.2% are selectable 
Liner material: Eflon, PFA, F46, Neoprene, Polyurethane 
Electrode Type: General type, scraper type and replaceable type 
Electrode material: Stainless steel SUS316, Hastelloy C, Titanium, Tantalum, Platinum-iridium, Stainless steel covered with tungsten carbide
Ambient Temperature: -25° C ~+ 60° C 
Ambient Humidity: 5~100%RH(relative humidity) 
Medium Electrical conductivity: 20μ s/cm 
Measuring Range: 1500: 1, flow rate< 15m/s 
Structure type: Integral type, remote type, submersible type, ex-proof type 
Protection Class: IP65, IP68(optional) 
Ex-proof Mark: ExmdIIT4 
Product Standard: JB/T 9248-1999 Electormagnetic Flowmeter 

Main performances of the electrode materials 
Stainless steel SUS316: 
Applicable in water, sewage and corrosive mediums. Widely used in industries of petrol, chemistry, carbamide, etc
Stainless steel: 
Covered with tungsten carbide Applicable in mediums of no corrosive and low abrasion. 
Hastelloy B(HB): 
Having strong resistance to hydrochloric acid of any consistance which is below bioling piont. Also resistable against vitriol, phosphate, hydrofluoricacid, organic acid etc which are oxidable acid, alkali and non-oxidable salt. 
Hastelloy C(HC): 
Be resistant to oxidable acid such as nitric acid, mixed acid as well as oxidable salt such as Fe+++, Cu++and sea water
Titanium: 
Applicable in seawater, and kinds of chloride, hypochlorite salt, oxidable acid(including fuming nitric acid), organic acid, alkali etc. Not resistant to a pure reducing acid(such as sulphuric acid, hydrochloric acid)corrosion. But if acid contains antioxidant(such as Fe+++, Cu++)is greatly reduce corrosion. 
Tantalum: 
Having strong resistance to corrosive mediums that is similar with glass. Almost applicable in all chemical mediums. Except for hydrofluoric acid, oleum and alkali. 
Platinum-iridium: 
Almost be applicable in all chemical mediums except for aqua fortis, ammonium salt.