![MQ-4 MQ4 DC5V LPG Alcohol Methane Hydrogen Smoke Gas Detector Sensor Module for Arduino: Amazon.com: Industrial & Scientific MQ-4 MQ4 DC5V LPG Alcohol Methane Hydrogen Smoke Gas Detector Sensor Module for Arduino: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/51YYw-YH45L._AC_UF1000,1000_QL80_.jpg)
MQ-4 MQ4 DC5V LPG Alcohol Methane Hydrogen Smoke Gas Detector Sensor Module for Arduino: Amazon.com: Industrial & Scientific
![gas sensor pinout circuit arduino simulation - projectiot123 Technology Information Website worldwide gas sensor pinout circuit arduino simulation - projectiot123 Technology Information Website worldwide](http://projectiot123.com/wp-content/uploads/2021/02/gas-sensor-Arduino-circuit.png)
gas sensor pinout circuit arduino simulation - projectiot123 Technology Information Website worldwide
![I have MQ-4 sensors like the one pictured. No instructions and can't find any regarding the sensitivity pot and how to adjust it. Anyone know? Other tips for these sensors also welcome! : I have MQ-4 sensors like the one pictured. No instructions and can't find any regarding the sensitivity pot and how to adjust it. Anyone know? Other tips for these sensors also welcome! :](https://i.redd.it/tkjtvfq9zs161.jpg)
I have MQ-4 sensors like the one pictured. No instructions and can't find any regarding the sensitivity pot and how to adjust it. Anyone know? Other tips for these sensors also welcome! :
![Amazon.com: 9PCS/Lot Gas Detection Sensor Module MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135 Sensor Module for Arduino : Industrial & Scientific Amazon.com: 9PCS/Lot Gas Detection Sensor Module MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135 Sensor Module for Arduino : Industrial & Scientific](https://m.media-amazon.com/images/I/81NYEi0YL3L.jpg)