... 1digital regis DMM28 (DD28) single phase mechanical kilo watt-hour meter is applicable to measure 50 Hz or 60 Hz active ... overall, or bakelite with glass window (optional); Meter base Aluminium, steel, bakelite etc; Meter terminal block is made of quality bakelite material ... different specifications,we can make according to your special requirements. DIN RAIL KWH METER,Din rail watt-hour meter,watt-hour ...