Abstract
Sensor is a kind of can feel the temperature and water level, and feel the temperature and water level changes in the electrical signal into a device. History of the development in the water heater, temperature and water level control has always been more concerned about people humanized design. Of the water and the water level monitoring can not be separated sensors, the stability of temperature and water level sensor is intelligent control of the entire water heater protection. The microcontroller-based temperature and water level control system is an improvement of intelligent products, control of its own high precision, good stability and low cost of the unique advantages in the future will be by a wide range of practical value, the microcomputer Improvement is also a wide range of applications with significant Key words: sensor, temperature detection, water level detection