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The main chip: LM393, MQ135 gas sensing probe
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Operating voltage: DC 5V
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Signal output indicator instructions;
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Dual signal output (analog output, and TTL level output)
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TTL output valid signal is low; (output low signal light, which can be accessed microcontroller IO port)
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Analog output with increasing concentration, the higher the concentration, the higher the voltage.
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Sulfide, benzene Department of steam, smoke and other harmful gases with high sensitivity
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Has a long life and reliable stability
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Rapid response recovery characteristics
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gas-sensitive element test concentration range: 10 to 1000ppm