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

MQ-2 Smoke Sensor MQ-2 Smoke Sensor is an original and brand new smoke and propane gas sensor. With a long

IR Receiving Head VS1838B Remote Control Receiver • Working Voltage : 2.7-5.5V • Power Dissipation : 35mW • Reception Distance

DESCRIPTION Your electronics can now see in dazzling color with this lovely color light sensor. We found the best color