DHT22 رقمي درجة حرارة and حساس رطوبة

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 <±ZKEEP0Z for temperature and ±ZKEEP1ZRH for humidity.
• Wide Measurement Range: Capable of measuring temperatures from -ZKEEP2Z to ZKEEP3Z and humidity from 0% to 100% RH.
• Excellent Long-Term Stability: Highly stable with low drift, rated at ±ZKEEP4ZRH 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:

ZKEEP5Z – ZKEEP6Z 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):

-ZKEEP7Z to ZKEEP8Z

Accuracy (Temp):

<±ZKEEP9Z

Resolution (Temp):

ZKEEP10Z

Repeatability:

±1% RH / ±ZKEEP11Z

Long-Term Stability:

±0.5% RH / year

Sensing Period (Average):

2 seconds

Dimensions:

ZKEEP12Z x ZKEEP13Z x ZKEEP14Z

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