Cảm biến chất lượng không khí phòng - Room air quality sensor LW04

Product overview
The mixed gas sensor is designed for the detection of air quality in living spaces. If the detected air quality is bad, the output of the sensor will rise to 10V.
Mixed gas sensors detect gases and vapours which can be oxidised (burnt): body odours, tobacco smoke, exhalations emitted by materials (furniture, carpets, paint, glue, etc.). In practice it has been proved that these devices indicate air quality which is detectable by the sensors. They have well proved themselves over the past years in a variety of applications.

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Measuring principle

A heated tin dioxide semi-conductor sensor varies its conductivity proportional to the number of molecules of reducing gases and thus amplifies the connected output voltage of the measuring element of DC 0V to 10V.

The following particles and gases are detected: Portions of cigarette smoke, hydrogen, carbon monoxide, ethanol and ammonia.
Contrary to CO2 sensors which measure concentration of a type of gas in a selective mode, the mixed gas sensors are wider band, i.e. the sensor signal neither shows the type of gas nor the concentration in ppm.

Due to the complex and ever changing composition of ambient air it is desirable that the air quality measurement of the sensor would be broadband.

 
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