Overview

DHT22 is a high performance temperature and humidity sensor, ensuring high reliability and excellent stability. It uses a capacitive humidity sensor to measure the relative humidity and a negative temperature coefficient thermistor (NTC) to measure the temperature. Those sensing elements are pre-calibrated and the output is provided as a digital signal. Data can be read once every 2 seconds.

Specifications

• Operating Voltage: 3.3 V to 5 V
• Current: 2.5 mA
• Humidity sensing range: 0 to 100% RH
• Humidity measurement accuracy: 2 to 5% RH
• Temperature measurement range: -40 °C to 80 °C
• Temperature measurement accuracy: ±0.5 °C
• Response time: 2 seconds
• Dimensions: 27 x 59 x 13.5 mm