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       * Long life                                                   * Air purifier                      

* High sensitivity                                             * Air quality monitoring                           

* Automatic calibration                                  * Air ventilation system

* Comes with temperature & humidity compensation        

       * Low cost     

Spec

* Module model:    AQM-300C

* Sensor: AQS501 air quality monitoring sensor

* Gas detection: ammonia, hydrogen, alcohol, carbon monoxide, methane, propane, Gan alkyl, styrene, propylene glycol, phenol, toluene, ethylbenzene, xylene, formaldehyde and other volatile organic gas, such as cigarettes, wood , paper burning smoke.

* Physical interface:      XH2.54-4 vertical outlet

* Output data: TTL level（built-in 200ohm current limiting resistance）

* Input voltage:      5.0±0.2VDC （without voltage reverse polarity protection）

* Operating current:      ≤80mA

* Warm-up time:    2 minutes

* Response time:    ≤10 seconds

* Recovery time:    ≤20 seconds

* Operating temperature:       -10 --- 40℃

* Operating humidity:    ≤95％RH

* Storage temperature:   -20 --- 60℃

* Storage humidity:       ≤60％RH

* Dimension:  24×20×15（L×W×H）

* Weight :    About 20g

* Sensitivity   :    1ppm hydrogen

* Sensitivity reduction:≤0.2%/year

* Life:     ≥10 years

Interface definition

1、  Power supply negative  －

2、  Power supply positive  ＋

3、  Output signal A

4、  Output signal B