The LM35 / LM 35 temperature sensor  is an integrated circuit sensor that can be used to measure temperature with an electrical output proportional to the temperature (in oC)

1 Features
• Calibrated Directly in Celsius (Centigrade)
• Linear + 10-mV/°C Scale Factor
• 0.5°C Ensured Accuracy (at 25°C)
• Rated for Full −55°C to 150°C Range
• Suitable for Remote Applications
• Low-Cost Due to Wafer-Level Trimming
• Operates from 4 V to 30 V
• Less than 60-μA Current Drain
• Low Self-Heating, 0.08°C in Still Air
• Non-Linearity Only ±¼°C Typical
• Low-Impedance Output, 0.1 Ω for 1-mA Load
2 Applications
• Power Supplies
• Battery Management
• HVAC
• Appliances