DD28 single-phase watt-hour meter is a kind of induction meter, which is applicable to measure the rated frequency 50Hz or 60Hz and power loss in electrified wire netting.

All technical targets are completely conformed to National Standard GB/T15283-94 and International Standard IEC 521.

The meter has separable electromagnet and the bearing has four kinds; Single-jewel, dual jewel, magnetic thrust and magnetic floating. The case has three kinds of aluminum, plastic and glass. The die-casting frame is alloy aluminum with excellent mechanical strength.