... in the conductivity can be converted to the corresponding output signal of the ... Module applications:Gas leak monitoring means, suitable for liquefied petroleum gas, butane, propane, methane, ... ) output, and AO analog signal output;3, TTL output valid signal is low. ... ) * 19 (W) * 22 (H)8, with a long life and reliable stability9, rapid ... wiring diagram of the sensor module New Factory direct MQ-2 smoke gas ...