The AM2301A or also known as DHT21 digital temperature sensor is one of the common from the range of DHT Temperature & Humidity sensors and boasts a relatively high temperature measurement accuracy of ±0.3℃ better compared to the DHT11 or DHT22 and 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.

Module Aspects:

• Accurate, durable and high quality
• 4 pin package
• Ultra low power
• No additional components
• Excellent long-term stability
• All calibration, digital output
• Completely interchangeable
• Long distance signal transmission
• Relative humidity and temperature measurement

Technical Specifications:

• Power: 3.3-5.2V DC
• HUMI: 0~99.9% RH
• TEMP: -40 ~ 80℃
• Precision: ±3% RH,  ±0.5 ℃
• Output: Digital (1 wire)
• Dimension: 60 x 27 x 14mm(L*W*H)

Package Includes:

• 1 x DHT21 / AM2301 Capacitive Digital Temperature And Humidity Sensor Module