Data Sheet

Aosong(Guangzhou) Electronics Co.,Ltd. TEL：[phone] www.aosong.com
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End signal:
Continue to output the low 50 microseconds after DHT11 the DATA pin output 40 data, and
changed the input state, along with pull-up resistor goes high. But DHT11 internal re-test environmental
temperature and humidity data, and record the data, waiting for the arrival of the external signal.
8、Application of information
1. Work and storage conditions
Outside the sensor the proposed scope of work may lead to temporary drift of the signal up to 300%RH. Return to
normal working conditions, sensor calibration status will slowly toward recovery. To speed up the recovery process
may refer to "resume processing". Prolonged use of non-normal operating conditions, will accelerate the aging of the
product.
Avoid placing the components on the long-term condensation and dry environment, as well as the following
environment.
A, salt spray
B, acidic or oxidizing gases such as sulfur dioxide, hydrochloric acid
Recommended storage environment
Temperature: 10 ~ 40 ℃ Humidity: 60% RH or less
2. The impact of exposure to chemicals
The capacitive humidity sensor has a layer by chemical vapor interference, the proliferation of chemicals in the
sensing layer may lead to drift and decreased sensitivity of the measured values. In a pure environment, contaminants
will slowly be released. Resume processing as described below will accelerate this process. The high concentration of
chemical pollution (such as ethanol) will lead to the complete damage of the sensitive layer of the sensor.
3. The temperature influence
Relative humidity of the gas to a large extent dependent on temperature. Therefore, in the measurement of humidity,
should be to ensure that the work of the humidity sensor at the same temperature. With the release of heat of
electronic components share a printed circuit board, the installation should be as far as possible the sensor away from
the electronic components and mounted below the heat source, while maintaining good ventilation of the enclosure.
To reduce the thermal conductivity sensor and printed circuit board copper plating should be the smallest possible,
and leaving a gap between the two.
4. Light impact
Prolonged exposure to sunlight or strong ultraviolet radiation, and degrade performance.