3.3 – 6 V Input
1-1.5 mA measuring current
40-50 uA standby current
Humidity from 0 – 100 % RH
-40 – 80 degrees C temperature range
+- 2 % RH accuracy
+- 0.5 degrees C
20 m max wire length



The DHT22 temperature and humidity sensor is a low-cost high precision humidity and temperature sensor with a single wire digital interface, meaning many of these sensors can be strung (daisy chained) together from one digital pin. The sensor is pre-calibrated and doesn’t require extra components so you can get right to measuring relative humidity and temperature.


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