HALJIA DHT21 AM2301 Capacitive Digital Temperature and Humidity Sensor

The DHT21 digital temperature sensor is one of the commonest from the range of DHT temperature sensors and boasts a relatively high temperature measurement accuracy of 0.5'C in 0.1'C steps with a relative humidity accuracy of +/- 3%. It has only 3 wires, including power and ground, meaning only one digital pin is required to interface it to a microcontroller. For Arduino development platforms the sensor is very well supported by the DHT library available from the Arduino Playground website. Model: AM2301 Power supply: 3.3-5V DC; Output signal: digital signal via single-bus; Sensing element: Polymer humidity capacitor; Measuring range: humidity 0-100%RH; temperature: -40~80Celsius Accuracy: humidity +-3%RH(Max +-5%RH); temperature [lessthan]+-1Celsius Resolution or sensitivity: humidity 0.1%RH; temperature 0.1Celsius Repeatability: humidity +-1%RH; temperature +-0.2Celsius Humidity hysteresis: +-0.3%RH Long-term Stability: +-0.5%RH/year Sensing period: Average: 2s Dimensions size: 59 x 27 x 13.5mm Product description Power supply: DC 3.5~5.5V; Humidity range: 0~100%RH; Temperature range: -40~80'C; Precision: +-3%RH / +-0.5'C;Packing List:1 x Temperature & Humidity Sensor