The LM35 series are precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the Celsius (Centigrade) temperature. The LM35 thus has an advantage over linear temperature sensors calibrated in ˚ Kelvin, as the user is not required to subtract a large constant voltage from its output to obtain convenient Centigrade scaling. The LM35 does not require any external calibration or trimming to provide typical accuracies of ±1⁄4˚C at room temperature and ±3⁄4˚C over a full −55 to +150˚C temperature range.
Tutorial available - http://goo.gl/fP5F4U
Calibrated directly in ˚ Celsius (Centigrade)
Rated for full −55˚ to +150˚C range
Low self-heating, 0.08˚C in still air
0.5˚C accuracy guaranteeable (at +25˚C)