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Real play Air quality sensor MQ135 hazardous gas detection sensor module

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US $5.39
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Air quality sensor MQ135 hazardous gas detection sensor module. Sensitive material MQ135 gas sensor used is a low conductivity in clean air of tin dioxide (SnO2). When the sensor is stored in the environment Pollution gases , conductivity sensor with increasing air pollution in the gas concentration increases. Using a simple circuit can change the conductivity Of the converted output signal corresponding to the gas concentration . MQ135 sensor for ammonia, sulfide , benzene vapor high sensitivity , smoke and other harmful monitoring is also very good. This sensor can be seized Measuring a variety of harmful gases , is a low-cost sensors for a variety of applications .

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  • Module Applications:
    Probing for families, environmental harmful gas detection devices , suitable for ammonia, aromatic compounds , sulfur compounds, benzene vapors, fumes and other gases harmful gases , gas sensors tested concentration range : 10 to 1000ppm

    Module features :
    1 , using high-quality dual-panel design, with power indicator and a TTL signal output instructions ;
    2, with a DO switch signal (TTL) output and analog output AO ;
    3, TTL output valid signal is low . ( When the output low signal light , can be directly connected microcontroller or relay modules )
    4, the higher the voltage, the concentration of the analog output voltage is higher.
    5 , air quality , hazardous gas detection has better sensitivity .
    6 , there are four screw holes for easy positioning ;
    7. Product Dimensions : 32 (L) * 20 (W) * 22 (H)
    8 , having a long life and reliable stability
    9 , rapid response and recovery characteristics

    Electrical properties:
    Input voltage : DC5V Power ( current ): 150mA
    DO output : TTL digital 0 and1 ( 0.1 and 5V)
    AO output: about 0.1-0.3V ( relatively clean ) , the highest concentration of voltage 4V
    Special note: the sensor is powered , needs to warm up around 20S, measured data becomes stable , sensor fever is a normal phenomenon , because the internal electric wire, if not normal hot .

    Wiring:
    1, VCC: positive power supply (5V)
    2, GND: power supply is negative
    3, DO: TTL switching signal output
    4, AO: analog output

    Real play Air quality sensor MQ135 hazardous gas detection sensor module

    Real play Air quality sensor MQ135 hazardous gas detection sensor module

    Real play Air quality sensor MQ135 hazardous gas detection sensor module

    Real play Air quality sensor MQ135 hazardous gas detection sensor module

    Real play Air quality sensor MQ135 hazardous gas detection sensor module

    Real play Air quality sensor MQ135 hazardous gas detection sensor module


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