DIN Rail Electronic Watt-hour Meter 1.CE,CB,ISO9001,14001,IEC ... , small volume, light weight, etc. General DDS238-4 single phase din rail watt-hour meter is a kind of new style according ... volume, light weight, special appearance, convenient installation, etc. Function and Features35mm standard DIN rail installation complies with standard DIN EN5002.Register display: 99999.9 kwh ...