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DHT11 Digital Temperature and Humidity Sensor
Product Description
Low cost digital temperature and humidity sensor.
Specification:
Body size: 15.5 x 12 x 5.5mm
Operating voltage: 5V
Digital output, 1 wire protocol.
Humidity Range: 20 to 90%RH ±5%
Temperature range: 0 to 50°C ±2°C
Requires a pull-up resistor (4.7K or 10K) on the data pin.
Links
http://playground.arduino.cc/Main/DHT11Lib
http://hackaday.com/2012/01/11/dht11-humidity-and-temperature-sensor-package/
https://learn.adafruit.com/dht
Need something more accurate with a wider range? Check out the DHT22 sensor.