Electronic thermometer allows you to monitor the temperature of various objects or environments that will be placed sensors, and visual observing the changes, as well as control whether the temperature in normal, warning You with a sound signal, if required.
The basis of the devices connected to the serial port, is used digital thermometer (temperature sensor) DS18B20 Dallas Semiconductor.
Software
The most successful, in my opinion, the program for monitoring temperature - Temp Keeper http://www.isens.ru.
Publication: msevm.com, www.cxem.net