DHT22 Temperature / Humidity Sensor
The DHT22 is a basic digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air with accuracies of +/- 0.5°C and +/- 2% relative humidity.
The DHT22 is a basic digital temperature and humidity sensor. The sensor uses the same internals as the AM2302, but sits in a much more compact, breadboard friendly package. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin (no analog input pins needed). Its fairly simple to use, but requires careful timing to grab data. The sensor is accurate to +/- 0.5°C and +/- 2% relative humidity. This version is breadboard compatible and works well with the Arduino, Raspberry Pi, and just about anything else with a digital I/O pin available.
We recommend a 5.1K Ohm pull up resistor between the power and output line on this sensor to ensure nice, stable communication.
- Temperature Accuracy: +/- 0.5°C
- Temperature Range: -40 - 80°C
- Temperature Resolution: 0.1°C
- Max Current: 2.5mA
- Voltage: 3 - 5VDC
- Relative Humidity Accuracy: +/- 2%
- Relative Humidity Resolution: 0.1%
- Sample Rate: 0.5Hz (once every 2 seconds)
- Size: 15.3 x 26 x 7.7mm / 0.6 x 1 x 0.3\"
- Breadboard friendly
- 1 x DHT22 Temperature / Humidity Sensor
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TutorialProduct Tutorial: http://learn.adafruit.com/dht
Online GuideOnline Guide: http://learn.adafruit.com/dht-humidity-sensing-on-raspberry-pi-with-gdocs-logging
This product has a 30 Day Warranty from the date of delivery. The item must not be modified, abused, incorrectly hooked up, or used for purposes outside the original scope of design.
This product is returnable Within 14 Days of delivery for a store credit. Item must be unopened, unused, and in re-saleable condition.