Note: If you are looking for a temperature sensor module which works with 3.3V system and offers reliable analog output, please consider the MCP9700 Linear Temperature Sensor manufactured by Cytron with high quality sensor IC from Microchip.

LM35 Temperature Sensor with Arduino Uno Tutorial

• Low-cost onboard temperature sensor
• Calibrated directly in celsius 
• TO-92 Package 

• 1 x LM35 Temperature Sensor

• Datasheet, pdf
• Getting Started with Temperature Sensor (Celsius) (SN-LM35DZ)