so I have a few of these: http://www.ti.com/lit/ds/symlink/lm35.pdf
when operating above freezing temperatures, the wiring couldn't be simpler, just measure the positive voltage, and the reading equates to the temp.
negative, however, is giving me a bit more trouble, as it outputs a negative voltage when the temperature of the sensor is below freezing. They give only a single example for this, which has me a bit lost, as I don't have any diodes or knowledge working with them. I was wondering, is there any way this voltage range could be rectified to 0v (being -55 degrees C) to 5v (being 155 degrees C)? is this something which could be done with a voltage divider, for instance?