DHT21 / AM2301 Capacitive Digital Temperature and Humidity Sensor

500.00 470.00

The AM2301 / DHT21 digital capacitive temperature and humidity sensor is used to measure the temperature and humidity of the atmosphere. It is good for 0-99.9% relative humidity readings with 3% accuracy and upto 80°C temperature it has ±1°C accuracy. It works with 3.3V to 5V DC, 2.5mA approximately, can be connected with microcontroller or external source.  

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AM2301 / DHT21 temperature and humidity sensor gives a digital output signal containing a calibrated temperature and humidity combined sensor. The temperature and humidity sensor technology to ensure that products with high reliability and excellent long-term stability. Sensor includes a capacitive humidity sensing element and a high-precision temperature measurement devices, and with a high-performance 8-bit microcontroller connected. Therefore, the product has excellent quality, fast response, anti-interference ability, high cost and other advantages. Ultra-small size, low power consumption, signal transmission distance up to 20 meters. The only real downside of this sensor is you can only get new data from it once every 2 seconds, sensor readings can be up to 2 seconds old. Compared to the DHTXX, this sensor is more precise, more accurate and works in a bigger range of temperature and humidity. A 4.7K pull up resistor is required to connect between the Vcc and Data pin for accurate reading. If multiple number of sensors are connected with the microcontrollers in the same pin then the resistor will be required.


  • Accurate, durable, low cost and high quality
  • 4 pin package
  • Ultra low powerconsumption
  • No additional componentsrequire
  • Excellent long-term stability
  • External calibration not required
  • Digital output can be fed to any microcontrollers, electronic circuit
  • ADC is not required
  • Long distance signal transmission
  • Relative humidity and temperature measurement
  • Accuracy is very high



  • Voltage: 3.3V – 5V DC
  • Current: 5mA approximately
  • Humidity: 0~99.9% RH
  • Temperature: -40°C to 80°C
  • Precision: 3% RH, 0.5°C Temperature
  • Output: Digital (1 wire)
  • Output current: Turn on 8 mA, turn off 10 to 20 µA
  • Power consumption: Dormancy 10 to 15 µA, measuring 500 µA, average 300 µA
  • Sampling period: 2 S



  • Measure temperature and humidity
  • Local Weather station
  • Automatic climate control with microcontroller
  • Environment monitoring



Package Contains:

  • 1 X AM2301 / DHT21 digital temperature and humidity sensor



  • As per availability / stock of the product we will provide the product.

Additional information

Weight 0.004 kg
Dimensions 6.0 × 2.7 × 1.4 cm


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