Temperature Sensors

TMP 36:

The TMP36 is a low voltage, precision centigrade temperature sensor. It provides a voltage output that is linearly proportional to the Celsius temperature. It also doesn't require any external calibration to provide typical accuracies of ±1°C at +25°C and ±2°C over the −40°C to +125°C temperature range. We like it because it's so easy to use: Just give the device a ground and 2.7 to 5.5 VDC and read the voltage on the Vout pin. The output voltage can be converted to temperature easily using the scale factor of 10 mV/°C.
Got this one from Sparkfun. Link to datasheet.

  • Voltage Input: 2.7 V to 5.5 VDC
  • 10 mV/°C scale factor
  • ±2°C accuracy over temperature
  • ±0.5°C linearity
  • Operating Range: −40°C to +125°C

DALLAS DS18B20 18B20 TO-92 Temperature Sensor

  • 1-Wire Interface Requires Only One Port Pin for Communication
  • Each Device Has A Unique 64-Bit Serial Code Stored In An On-Board Rom
  • Requires No External Components
  • Thermometer Resolution is User Selectable from 9 to 12 Bits

Got from this seller's Amazon listing.

AM2302 DHT22 Temperature and Humidity Sensor Board Module

Arduino tutorial from Adafruit.

See Raspberry Pi hacks book for example usage.

Got from this seller's listing.