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PDF AM2302 Data sheet ( Hoja de datos )
| Número de pieza | AM2302 | |
| Descripción | Digital relative humidity & temperature emperature sensor | |
| Fabricantes | ETC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AM2302 (archivo pdf) en la parte inferior de esta página. Total 5 Páginas | ||
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Your specialist in innovating humidity & temperature sensors
Standard AM2302/DHT22
AM2302/DHT22 with big case and wires
Digital relative humidity & temperature sensor AM2302/DHT22
1. Feature & Application:
*High precision
*Capacitive type
*Full range temperature compensated
*Relative humidity and temperature measurement
*Calibrated digital signal
*Outstanding long-term stability
*Extra components not needed
*Long transmission distance, up to 100 meters
*Low power consumption
*4 pins packaged and fully interchangeable
2. Description:
AM2302 output calibrated digital signal. It applys exclusive digital-signal-collecting-technique and humidity
sensing technology, assuring its reliability and stability. Its sensing elements is connected with 8-bit single-chip
computer.
Every sensor of this model is temperature compensated and calibrated in accurate calibration chamber and the
calibration-coefficient is saved in type of programme in OTP memory, when the sensor is detecting, it will cite
coefficient from memory.
Small size & low consumption & long transmission distance(100m) enable AM2302 to be suited in all kinds of
harsh application occasions. Single-row packaged with four pins, making the connection very convenient.
3. Technical Specification:
Model
Power supply
Output signal
Sensing element
Operating range
Accuracy
Resolution or sensitivity
Repeatability
Humidity hysteresis
Long-term Stability
Interchangeability
AM2302
3.3-5.5V DC
digital signal via 1-wire bus
Polymer humidity capacitor
humidity 0-100%RH;
humidity +-2%RH(Max +-5%RH);
humidity 0.1%RH;
humidity +-1%RH;
+-0.3%RH
+-0.5%RH/year
fully interchangeable
temperature -40~80Celsius
temperature +-0.5Celsius
temperature 0.1Celsius
temperature +-0.2Celsius
Thomas Liu (Sales Manager)
-1-
Email: [email protected]
1 page  
Your specialist in innovating humidity & temperature sensors
7. Electrical Characteristics:
Items
Power supply
Current supply
Collecting
period
Condition
DC
Measuring
Stand-by
Second
Min
3.3
1
40
Typical
5
Null
2
Max Unit
6V
1.5 mA
50 uA
Second
8. Attentions of application:
(1) Operating and storage conditions
We don't recommend the applying RH-range beyond the range stated in this specification. The AM2302 sensor
can recover after working in abnormal operating condition to calibrated status, but will accelerate sensors' aging.
(2) Attentions to chemical materials
Vapor from chemical materials may interfere AM2302's sensitive-elements and debase AM2302's sensitivity.
(3) Disposal when (1) & (2) happens
Step one: Keep the AM2302 sensor at condition of Temperature 50~60Celsius, humidity <10%RH for 2 hours;
Step two: After step one, keep the AM2302 sensor at condition of Temperature 20~30Celsius, humidity
>70%RH for 5 hours.
(4) Attention to temperature's affection
Relative humidity strongly depend on temperature, that is why we use temperature compensation technology to
ensure accurate measurement of RH. But it's still be much better to keep the sensor at same temperature when
sensing.
AM2302 should be mounted at the place as far as possible from parts that may cause change to temperature.
(5) Attentions to light
Long time exposure to strong light and ultraviolet may debase AM2302's performance.
(6) Attentions to connection wires
The connection wires' quality will effect communication's quality and distance, high quality shielding-wire is
recommended.
(7) Other attentions
* Welding temperature should be bellow 260Celsius.
* Avoid using the sensor under dew condition.
* Don't use this product in safety or emergency stop devices or any other occasion that failure of AM2302 may
cause personal injury.
Thomas Liu (Sales Manager)
Email: [email protected]
-5-
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet AM2302.PDF ] | |
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