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5b6832e51f48dc4ee69d5a6e DHT22 Digital Temperature And Humidity Sensor https://cdn1.storehippo.com/s/59c9e4669bd3e7c70c5f5e6c/ms.products/5b6832e51f48dc4ee69d5a6e/images/5b6832e51f48dc4ee69d5a6f/5b68329c95f0fe4f4d6df169/webp/5b68329c95f0fe4f4d6df169.jpg

Description

The DHT22 is a basic, low-cost digital temperature and humidity sensor. 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).

Simply connect the first pin on the left to 3-5V power, the second pin to your data input pin and the right most pin to ground. Although it uses a single-wire to send data it is not Dallas One Wire compatible! If you want multiple sensors, each one must have its own data pin.

Compared to the DHT11, this sensor is more precise, more accurate and works in a bigger range of temperature/humidity, but its larger and more expensive.

Comes with a 4.7K - 10K resistor, which you will want to use as a pullup from the data pin to VCC.

Product Details

Humidity sensor Polymer humidity capacitor
Temperature sensor Thermistor
Supply voltage 3.3 to 5.5V DC
Operating range humidity 0 to-100 % RH , temperature - 40 to 80 deg Celsius
Output signal digital signal via 1- wire bus
Resolution or sensitivity humidity 0.1% RH ; temperature 0.1 Celsius
Repeatability humidity +/- 1% RH; temperature +/- 0.2 Celsius
Sensing period Average: 2 s
Accuracy humidity +/- 2 % RH (Max +/- 5 % RH) ,
Model DHT22
Sensor Length (millimetre) small size 14 x 18 x 5.5 mm; big size 22 x 28 x 5 mm

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DHT22 Digital Temperature And Humidity Sensor

Description of product

Description

The DHT22 is a basic, low-cost digital temperature and humidity sensor. 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).

Simply connect the first pin on the left to 3-5V power, the second pin to your data input pin and the right most pin to ground. Although it uses a single-wire to send data it is not Dallas One Wire compatible! If you want multiple sensors, each one must have its own data pin.

Compared to the DHT11, this sensor is more precise, more accurate and works in a bigger range of temperature/humidity, but its larger and more expensive.

Comes with a 4.7K - 10K resistor, which you will want to use as a pullup from the data pin to VCC.

Product Details

Humidity sensor Polymer humidity capacitor
Temperature sensor Thermistor
Supply voltage 3.3 to 5.5V DC
Operating range humidity 0 to-100 % RH , temperature - 40 to 80 deg Celsius
Output signal digital signal via 1- wire bus
Resolution or sensitivity humidity 0.1% RH ; temperature 0.1 Celsius
Repeatability humidity +/- 1% RH; temperature +/- 0.2 Celsius
Sensing period Average: 2 s
Accuracy humidity +/- 2 % RH (Max +/- 5 % RH) ,
Model DHT22
Sensor Length (millimetre) small size 14 x 18 x 5.5 mm; big size 22 x 28 x 5 mm