size:32 mm x 22 mm x 27 mm long x wide x high.main chip:zymq-135 lm393 gas sensor.working voltage:5 v dc.1 with the signal output.2 dual signal output (analog output and ttl level output).
• 3 ttl output valid signal is low.(when the output is low,the signal light is bright,can be directly connected to the mcu)
• .4 analog output 0~5v voltage,the higher the concentration,the higher the voltage.5 to hydrogen sulfide,liquefied petroleum gas,natural gas,city gas,smoke has better sensitivity.
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