Description
The DHT22 Temperature and Humidity Sensor is a highly accurate and reliable digital sensor for measuring temperature and humidity in various applications. It is an upgrade from the DHT11 sensor, offering improved accuracy and range, and is widely used in a variety of applications such as home automation, weather monitoring, and industrial control. The DHT22 uses a capacitive humidity sensing element and a thermistor to measure the relative humidity and temperature, respectively. The sensor provides a digital output via a single wire interface, making it easy to connect to a microcontroller or other digital circuit.
DHT22 output calibrated digital signal. Small size & low consumption & long transmission distance(20m) enable DHT22 to be suited in all kinds of harsh application occasions. Single-row packaged with four pins, making the connection very convenient.
.jpg)
As you can see, the sensor size is so small when we compared with Malaysia 20 cent. Alternatively the size should be around our index finger size.
Features
- Low cost
- 3 to 5V power and I/O
- 2.5mA max current use during conversion (while requesting data)
- Good for 0-100% humidity readings with 2-5% accuracy
- Good for -40 to 80°C temperature readings ±0.5°C accuracy
- No more than 0.5 Hz sampling rate (once every 2 seconds)
- Body size 27mm x 59mm x 13.5mm (1.05″ x 2.32″ x 0.53″)
- 4 pins, 0.1″ spacing
- Weight (just the DHT22): 2.4g
Tutorials
Resources
- Datasheet (DHT22)
Robo Admin T –
Cheap and Good Product!