Generic 6 Pin Universal Sensor Socket (MG811 MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-9) - Flange Mount

This socket is designed for the standard 6-pin layout common to many popular MQ-series gas sensors. It is directly compatible with models including the MG811 (CO2), MQ-2 (Combustible Gas), MQ-3 (Alcohol), MQ-4 (Methane), MQ-5 (LPG/Natural Gas), MQ-6 (LPG/Isobutane), and MQ-9 (CO/Combustible Gas). Always verify your specific sensor's pinout matches the socket orientation before installation.

The socket features a flange mount design. You can secure it to your PCB by passing its pins through corresponding plated through-holes and soldering them in place, using the flanges for added stability. For breadboarding, you can solder standard male pin headers to the socket's pins. Wiring follows the sensor's standard pinout: typically, two pins are for heater supply (H1, H2), two for sensor electrode (A, B), and two for power (VCC, GND). Consult your specific sensor's datasheet for the exact pin assignment.

When properly installed with secure solder joints, the socket introduces negligible resistance and should not measurably affect the sensor's analog output signal accuracy. Its primary purpose is to provide a reliable mechanical and electrical interface, eliminating the wear and tear caused by directly soldering and desoldering the sensitive pins on the sensor module itself. Ensure all connections are clean and tight for optimal performance.

While specifically designed for the 6-pin footprint of MQ-series sensors, it may physically accept other modules with an identical 2x3 pin header layout. However, electrical compatibility is not guaranteed. Critical factors include pin spacing (standard 2.54mm), pin count (6), and the electrical function of each pin (power, ground, analog out). Always cross-reference the target sensor's pinout diagram with the socket's pin connections before use to avoid damage.