Profile: Middle-South Meter Co Ltd specializes in electro-magnetic single-phase/three phase energy meters, electronic single-phase energy meters, installed-type panels, pressure meters and electric voltmeters. Our DDS193 is an electronic single-phase watt-hour meter that adopts large-scale measure energy IC chip and advanced SMT full-auto paster welding technology with electronic elements & structure material. We are certified to ISO 9000 standard.