EC Buying 5Pcs MQ-2 Gas Sensor Module, Smoke and Combustible Gas Detection Board with Analog and Digital Output, Adjustable Sensitivity, 5V Operation for MCU Development Projects

["Semiconductor gas sensor designed to detect smoke and combustible gases.","Provides both analog output and digital threshold output for flexible signal processing.","Adjustable sensitivity via onboard potentiometer for custom detection levels.","Integrated heater element supports stable sensing performance after warm-up.","Compatible with 5V microcontroller systems and development boards."]