Virtuabotix DHT22 Digital Temperature/Humidity Sensor
Description:We brought you protection from the dangers of heavy metal poisoning;we taught you how to keep your tongue comfortably inside your mouth while gauging the humidity of your surroundings;but still you demanded more... and, we listened.The bigger, better DHT22 not only replaces the  DHT11, but we have carefully written a library for it that is 100% compatible with code written for the DHT11 library (of course you have to call and declare a dht22 instead of dht11).The DHT22 gives resolution of up to 0.1 % humidity and 0.1 degrees C (accuracy is +- 0.5 C);Which makes it perfect for applications that require a little more precision to get the job done.In addition the ranges of operation are raised to 0% to 100% humidity, and -45 to 125 degrees C.The DHT22 is a robust little one-wire device that can measure both temperature and humidity; it is perfect for almost any indoor or outdoor use and can stand up to a lot more of the elements than its cousin the DHT11!Technical Specifications:Working Voltage : 3.5 to 5V(DC)One Wire DeviceTemperature Range: -45 to 125 C (-49 to 257 F)Temperature Precision: +/- 0.5 CHumidity Range: 0% to 100%Humidity Precision: +/- .05%Resolution: 0.1 C Temperature & 0.1% HumidityPackage Contents:DHT22 Ultrasonic ModulePin-out and Instruction PamphletArduino Library Features:DHT22 Specific (easy config and compatible with code written for DHT11)Built in unit conversions (C/F/K)Built in Dew Point Calculations (Standard, and Fast)• Easy to use examples