DHT22 Digital Temperature and Humidity Sensor

Description

DHT22 Digital Temperature and Humidity Sensor The DHT22 is a popular, low-cost digital sensor for measuring relative humidity and temperature. It uses a capacitive humidity sensor and a thermistor, which are connected to an internal 8-bit single-chip computer to output a calibrated digital signal. Features: Dual Function: Measures both relative humidity and temperature in one package. Calibrated Digital Output: Provides a fully calibrated digital signal. High Accuracy: Delivers precise measurements with an accuracy of < ± 0.5°C for temperature and ± 2%RH for humidity. Wide Measurement Range: Capable of measuring temperatures from -40°C to 80°C and humidity from 0% to 100% RH. Excellent Long-Term Stability: Highly stable with low drift, rated at ± 0.5%RH per year. Long Transmission Distance: The digital signal can be reliably transmitted over a distance of up to 20 meters. Low Power Consumption: Efficient design ideal for battery-powered applications. Specifications: Parameter Value Model: DHT22 Power Supply: 3.3V – 6V DC Output Signal: Digital signal via single-bus Sensing Element: Polymer Capacitor Operating Range (Humidity): 0 – 100% RH Accuracy (Humidity): ±2% RH (Max ±5% RH) Resolution (Humidity): 0.1% RH Operating Range (Temp): -40°C to 80°C Accuracy (Temp): <±0.5°C Resolution (Temp): 0.1°C Repeatability: ±1% RH / ±0.2°C Long-Term Stability: ±0.5% RH / year Sensing Period (Average): 2 seconds Dimensions: 25.1mm x 15.1mm x 7.7mm Pinout: Pin Description VCC Power Supply DATA Digital Data Output GND Ground Applications: Home Automation and Smart Home Devices. Personal Weather Stations. HVAC (Heating, Ventilation & Air Conditioning) Systems. Indoor Air Quality Monitoring. Environmental Data Logging. Package Contents: 1x DHT22 Digital Temperature and Humidity Sensor. 3x Female To Female Wire. Datasheet

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