DDSY39 (LCD) adopts LSI &SMT industry element and long-duration element of international band. It meets the require ment of GB/T18460.3-2001:The third part of the IC prepayment sale system; prepayment meter. and GB/T17215-2002: Class1 and class2 static communication active meter. This product has functions of prepayment, load threshold control. They have the characteristics of small size, long-life high accuracy, good stability, low power consumption etc.

DDSY39 (LED) single-phase prepayment static energy meter is which adopts based on special large-scale integrated circuit and SMT technology, adopting industrial elements and components with long lifetime introduced form abroad. It preserves data under power-off situation. This product conforms to IEC62055-21-2005 & GB/T18460: Electricity metering, prepayment systems. and IEC62053 & GB/T18460.3- 2001: class 1 and class 2 static AC active watt-hour meter.

DSSY3/DTSY3 series three-phase pre-payment static energy meter is improved and produced on the bases of the static three-phase active watt-h our meter. It has multiple functions: electrical energy measuring an d user's information management and so on. The product is an ideal product to solve problems in electrical energy fee in arrears and anti-tampering, as well as commercializing electrical energy and adjusting load in the electric network.