The AM2301A / DHT21 is a digital temperature & humidity sensor with high accuracy. It provides a temperature accuracy of +/- 0.5 °C and a humidity accuracy of +/- 3 % relative humidity.
Specifications:
- Model: AM2301 / DHT21
- Power supply: DC 3.3-5.5 V
- Max. Current: 2.5 mA
- Sampling rate: 0.5 Hz (once every 2 seconds)
- Output signal: 1-wire bus digital signal
- Sensor element: Polymer humidity capacitor
- Measuring range: 0-100 % humidity RH; temperature: -40 ~ 80 °C
- Accuracy: ±3 % humidity (max. ±5 % RH); temperature ±0.5 °C
- Resolution or sensitivity: 0.1 % relative humidity; temperature 0.1 °C
- Repeatability: humidity ±1 % RH; temperature ±0.3 °C
- Humidity hysteresis: +/-0.5 % RH
- Long-term stability: ±0.5 %RH / year
- Housing material: plastic
- Cable length: 230 mm
- Dimensions: approx. 58.8 x 26.7 x 13.8 mm
Pin assignment:
- Red: VDD (3.3-5.2 V)
- Yellow: SDA (Serial Data Port)
- Black: GND
Scope of delivery:
- 1 x AM2301A / DHT21 Temperature & humidity sensor
Further links to "AM2301A / DHT21 Digital temperature & humidity sensor"
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