MQ-4 Good Sensity Smoke Methane Gas Sensor Module for Arduino
Main Features: ● Suitable for home or factory methane gas, natural gas, and other monitoring devices. ● Indication of the signal output. ● With dual signal output. (Analog output, and TTL level output) ● When TTL low output signal is light, it can be connected directly to the microcontroller. ● When the concentration is higher, the analog output voltage (0 - 5V) is also become higher. ● The module has better sensitivity for methane gas and the natural gas.