Combined with the principle of differential pressure transducer for water-level

and taking the measurement of boiler drum-level in Shanhe Power-Generation Company as an example

the influence of environment variation around the connecting pipeline at steam-water side upon the measured output of water-level transducer has been analysed

and measures for reducing the abnormality of its measured output

such as adopting thermal insulation for sampling tube and connecting pipe at steam-water side

and carrying out temperature correction etc.being put forward.