The nominal accuracy of radar level gauge means the outage accuracy of liquid tank, and the innage accuracy is uncertain, which is influenced by the installation, field verification procedure, gauging method,reference height variations with oil depth and temperature errors.

As the instrument design of Lanzhou Petrochemical Company 6kt/a USY zeolite project as practical sample,the principle of radar level gauge,the model selection of radar level gauge in special condition and notes in installation and debugging is introduced in detail.

Taking the instrument design of Lanzhou Petrochemical Company 49/1 tank project as practical sample,the model selection of level measurement instrumentation on the spherical tank is introduced,the model selection,application of radar level gauge and supersonic liquid switch are described in detail.

Thus,the working principle,its properties,the composition of measure system,requirements for model selection,and the key points for installating radar liquid level meter are further introduced in this paper.

The measurement principle of the metering radar level transmitter is described briefly to shoot the level measurement methods of the ethylene,propylene and LPG tank and the problems occurred in process media metering.

Illustrate the necessity of adopting radar liquid level gauge for carbon decomposing tank by analyzing the measuring principle and service condition of radar liquid level gauge of E+H Company.

Illustrate the necessity of adopting radar liquid level gauge for carbon decomposing tank by analyzing the measuring principle and service condition of radar liquid level gauge of E + H Company.