MQ-9, MQ9 Flammable Gas Detection Sensor Module for Arduino Specification: Model: MQ-9 Type: Analog Detecting Type: Carbonic Oxide(Co), Flammable Gas Rated Voltage: DC 3-5V Detecting Range: 10-1000ppm Pin Definition: AO-analog Output,DO-Digital Output,GND- Ground,VCC-Voltage To Current Converter Total Size: 35 x 20 x 21mm/ 1.4″ x 0.79″ x 0.83″ (L*W*H) Net Weight: 8g The Analog CO/Combustible Read more about MQ9 DC 3-5V 10-1000ppm Carbonic Oxide Gas Sensor Module Detector for Arduino[…]