DHT22

The?DHT22 Digital Temperature and Humidity Sensor Module?AM2302?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).?AM2302 Sensing Module?is fairly simple to use but requires careful timing to grab data. The only real downside of this sensor is you can only get new data from it once every 2 seconds, so when using our library, sensor readings can be up to 2 seconds old. The?Temp and Humidity sensor?DHT22?can measure temperature from?-40?C to 80?C?and humidity from?0% to 100%?with an accuracy of ?1?C and ?1%. So if you are looking to measure in this range then this sensor might be the right choice for you.

Features Of DHT22 Capacitive Humidity Sensing Digital Temperature And Humidity Module:

• High precision
• Capacitive type
• Full range temperature compensated
• Relative humidity and temperature measurement
• Calibrated digital signal
• Outstanding long-term stability
• Extra components not needed
• Long transmission distance
• Low power consumption
• 4 pins packaged and fully interchangeable

Specifications Of Digital Temperature and Humidity Meter DHT 22:

1. Operating Voltage: 3.5V to 5.5V
2. Operating current:?0.3mA (measuring) 60uA (standby)
3. Output:?Serial data
4. Temperature Range:?-40?C to 80?C
5. Humidity Range: 0% to 100%
6. Resolution:?Temperature and Humidity both are 16-bit
7. Accuracy: ?0.5?C and ?1%

Applications:

• Measure temperature and humidity
• Local Weather station
• Automatic climate control
• Environment monitoring