DHT11 is a composite sensor that includes a calibrated digital signal output of the temperature and humidity. Application of a dedicated digital modules collection technology and the temperature and humidity sensing technology, to ensure that the product has high reliability and excellent long-term stability.
The document introduces the Aosong DHT11, a composite digital sensor that measures temperature and humidity using a resistive sensing element and an NTC device connected to an 8-bit microcontroller. It details the sensor's applications in HVAC, consumer goods, and automotive industries, highlighting features such as low cost, long-term stability, and digital signal output.
| Relative Humidity Resolution | 16Bit |
|---|---|
| Relative Humidity Accuracy | ±5% RH at 25℃ |
| Temperature Resolution | 16Bit |
| Temperature Range | ±2℃ at 25℃ |
| Power Supply | DC 3.5～5.5V |
| Supply Current (Standby) | 60μA |
| Sampling Period | more than 2 seconds |
A 5.1kΩ pull-up resistor is recommended for short cable lengths of 20 meters.
The host must wait at least 1 second after power-on before sending instructions.
The response time is 6 seconds for 63% humidity change in 1m/s air.