DHT21 Temperature and Humidity Sensor

DHT21 is an advanced sensor unit that provides calibrated digital signal output for temperature and humidity detection. It is highly reliable and stable for long-term operations. It includes an 8-bit microcontroller for fast and high-quality responses.

The unit can measure temperature with an accuracy of +/-1°C in the range of -40 to 80°C and humidity with an accuracy of +/-5% RH in the range of 0-100% RH. Due to the sensor's data collection period, measurement results can be obtained at intervals of 2 seconds. The DHT21 is slightly larger in size compared to other DHT models.

Features

• A high-performance model in the DHT series.
• Provides digital output.
• Operating Voltage: 3.3-5 VDC
• Measurement Range:
  • Humidity: 0-100% RH
  • Temperature: -40 to 80 °C
• Accuracy:
  • Humidity: +/- 3% (Max +/- 5%) RH
  • Temperature: < +/- 1°C
• Measurement Period: 2 seconds
• Product Dimensions: 27x59x13.5 mm

Note: All DHT models have similar features, so an application designed for one model can be applied to different models as well.