Temperature and Humidity Sensor DHT22

Temperature and Humidity Sensor DHT22 - EXTH22

Sensor specifications:

  • Supply voltage: 3V to 5V

  • Maximum current: 2.5mA, during data request

  • Humidity measurement range: 0-100%

  • Humidity measurement accuracy: 2-5%, resolution up to 0.1%

  • Temperature measurement range: -40 - +80 °C

  • Temperature measurement accuracy: ±0.5°C, resolution 0.1°C

  • Measurement speed: no more than 0.5Hz (every 2 seconds)

  • Dimensions: 27mm x 59mm x 13.5mm

  • Weight: 0.003 kg.

€7.44 pcs
Tax included

Temperature and humidity sensor DHT22 is a basic and inexpensive digital sensor for measuring temperature and humidity. A capacitive sensor is used to measure humidity, and a thermistor is used to measure temperature. The measurement results are sent to the DATA pin (there is no analog pin indicating voltage levels). The rate at which new data is read from the DATA pin is once every 2 seconds. It is advisable to connect a high-value pull-up resistor to the DATA pin. The sensor has 4 pins, of which 3 are used – VCC, DATA and GND. The DHT22 sensor also features a mounting hole for secure attachment.

Compared to a similar sensor (DHT11) DHT22 is more precise, more accurate, and has a wider operating range for the measured values. A drawback is that it has larger physical dimensions.

Wiring diagram (when using an Arduino-type microcontroller):

Additional information:

Datasheet 570,5 KB
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