MQ2 MODULE This analog gas sensor has a small heating element with an electronic-chemical sensor. It is suitable for use

MQ-4 Methane Sensor The sensitive material of the MQ-4 gas sensor is SnO2, which with lower conductivity in clean air.

MQ135 Features – Sensitive material MQ135 gas sensor is used in clean air low conductivity tin oxide (SnO2). When the

The MQ-6 LPG – Isobutane – Propane Gas Sensor a semiconductor gas sensor that detects the presence of LPG, Isobutane,