At present

water level monitoring and control are carried out mainly through float type

pressure type and ultrasonic wave water level gauge

which has drawbacks such as large fluctuations of reading and poor realtime and high investment costs. Peripheral hardware circuit and software design based on DZ-H diffusion silicon liquid level transmitter

and water level measurement experiment are carried out. Experimental results show that the designed measurement circuit of DZ-H diffusion silicon liquid level transmitter is reliable

because the biggest temperature drift caused by temperature change is 0. 07 mA / ℃

liquid level measurement error is not more than 0. 04 m

the precision is higher. The design can real-time monitor change of water level and dynamically show datas and overcome effects of underwater alluvial on measurement datas.