... 21 DSM228-02 single phase two wire electronic active energy meter, cyclometer display.The meter is used to measure 50Hz or 60Hz ... from single phase two wire AC electricity net. The meter adopts LSI (Large-scale Integration) and SMTmanufacturing technique,the ... reliability, small volume, light weight, specious appearance, etc..The meter is widely used in office buildings, shopping malls, residences, ...