Abstract: The dredged mud output meter can introduce electrical resistance tomography (ERT) density meter to replace the traditional nuclear technology density meter. This article introduces the main components of the ERT technology output meter, and analyzes its core component ERT density meter working principle and industry Application advantages, and conducted experimental research on the construction site. Through test records and analysis of nuclear technology yield meter, ERT technology yield meter measurement data and tank volume direct measurement data under different mud densities, the conclusion shows that the measurement data based on ERT technology yield meter is more accurate than nuclear technology yield meter when installed horizontally.