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Hobby Components DHT21 AM2301 Temperature and Humidity Sensor
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About the item
The DHT21 digital temperature sensor is one of the commonest from the range of DHT temperature sensors and boasts a relatively high temperature measurement accuracy of 0.5oC in 0.1oC steps with a relative humidity accuracy of +/- 3%. It has only 3 wires, including power and ground, meaning only one digital pin is required to interface it to a microcontroller. For Arduino development platforms the sensor is very well supported by the DHT library available from the Arduino Playground website.
Product Code: HCSENS0026
Model: AM2301
Power supply: 3.3-5V DC
Output signal: digital signal via single-bus
Sensing element: Polymer humidity capacitor
Measuring range: humidity 0-100%RH; temperature -40~80Celsius
Accuracy: humidity +-3%RH(Max +-5%RH); temperature [lessthan]+-1Celsius
Resolution or sensitivity: humidity 0.1%RH; temperature 0.1Celsius
Repeatability: humidity +-1%RH; temperature +-0.2Celsius
Humidity hysteresis: +-0.3%RH
Long-term Stability: +-0.5%RH/year
Sensing period: Average: 2s
Dimensions size 59*27*13.5mm
Example Arduino Sketch, Library and Datasheet available on our support forum.
- The DHT21 digital temperature sensor is one of the commonest from the range of DHT temperature sensors and boasts a relatively high temperature measurement accuracy of 0.5oC in 0.1oC steps with a relative humidity accuracy of +/- 3%. It has only 3 wires, including power and ground, meaning only one digital pin is required to interface it to a microcontroller. For Arduino development platforms the sensor is very well supported by the DHT library available from the Arduino Playground website..
- Product Code: HCSENS0026 Model: AM2301 Power supply: 3.3-5V DC Output signal: digital signal via single-bus Sensing element: Polymer humidity capacitor Measuring range: humidity 0-100%RH; temperature -40~80Celsius.
- Accuracy: humidity +-3%RH(Max +-5%RH); temperature [lessthan]+-1Celsius Resolution or sensitivity: humidity 0.1%RH; temperature 0.1Celsius Repeatability: humidity +-1%RH; temperature +-0.2Celsius.
- Humidity hysteresis: +-0.3%RH Long-term Stability: +-0.5%RH/year Sensing period: Average: 2s Dimensions size 59*27*13.5mm.
- Example Arduino Sketch, Library and Datasheet available on our support forum..
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