DHT22 Digital Temperature Humidity Sensor Module

• The DHT22 is a low cost digital temperature and humidity sensor with a single wire digital interface. 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).

  The sensor is calibrated and doesn’t require extra components so you can get right to measuring relative humidity and temperature.

  It is quite simple to use, but requires careful timing to grab data. You can only get new data from it once every 2 seconds.

  Features:

  ·        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

  ·        Measuring range: temperature -40-80 ℃; humidity 0; 99.9%RH

  ·        Measurement accuracy (25℃): temperature: + 0.5; humidity: + 2%RH (10; 90%RH)

  ·        Resolution: temperature: 0.1 ℃, humidity: 0.1%RH

  ·        Attenuation value: temperature: <1℃ / year; humidity: < 1%RH/ years

  ·        Sensor type: temperature: resistance type sensor; humidity: capacitive sensor

  ·        Response time: temperature: 5S; humidity: 5S 1/e (63%)

  ·        Work within the scope: -40-80℃

  ·        Power source: DC3.3-5.5V

  ·        Shell material: PC plastic

  ·        Weight:1g

  ·        Color: White

  Specifications:

  ·        Operating Voltage: 3.5V to 5.5V

  ·        Operating current: 0.3mA (measuring) 60uA (standby)

  ·        Output: Serial data

  ·        Temperature Range: -40°C to 80°C

  ·        Humidity Range: 0% to 100%

  ·        Resolution: Temperature and Humidity both are 16-bit

  ·        Accuracy: ±0.5°C and ±1%

  ·        Size: 38 x 20mm

Watch this video it will give you a clear idea about this product.

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