LM35 Temperature Sensor TO92 Descripiton: The LM35 is an integrated circuit sensor that can be used to measure temperature with an electrical output proportional to the temperature (in oC) The LM35 - An Integrated Circuit Temperature Sensor Why Use LM35s To Measure Temperature? You can measure temperature more accurately than a using a thermistor. The sensor circuitry is sealed and not subject to oxidation, etc. The LM35 generates a higher output voltage than thermocouples and may not require that the output voltage be amplified.