Description:
DHT-22 is a low cost high precision humidity and temperature sensor with a single wire digital interface.
The sensor is pre-calibrated and doesn't require extra components so you can get right to measuring relative humidity and temperature.
Features:
- 2 x DHT22 sensors
- 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
FAQ
1. What length of wires can we use for connecting the DHT22 sensor?
A. Upto 20M length wire can be used when wiring the DHT22 sensor.
2. What is the difference between the DHT11 and DHT22 sensor?
A. The DHT22 is a superior sensor as it has resolution of 0.1 Degrees and better accuracy compared to the cheaper DHT11 sensor.
3. Is a pull up resistor recommended for DHT22 signal line?
A. A pullup resistor of 4.7K is recommended to be connected to the signal line and VCC pin to improve signal integrity. If you are seeing many failed reads, having this pull up will help.
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Catalog:
Price: $31.99