本温度计属于多功能温度计，可以设置上下报警温度，当温度不在设置范围内时，可以报警。

　　数字温度计所测量的温度采用数字显示，控制器使用单片机89S51，测温传感器使用DS18B20，用3位共阳极LED数码管以串口传送数据，实现温度显示。-The use of digital temperature sensor DS18B20 temperature measurement signal, after calculations show the corresponding temperature value on the LED digital tube. A temperature measurement range of 1 to 99 degrees. The thermometers are versatile thermometer, you can set the upper and lower temperature alarm when the temperature is not set range, can call the police. Digital thermometer to measure the temperature with digital display controller using microcontroller 89S51, temperature sensor DS18B20, with three common anode LED digital serial transmission of data in order to achieve temperature display. Can easily be read directly measured temperature value from the temperature sensor DS18B20, convert that to meet the design requirements.