Arduino gas sensor

【MQ-7 Carbon Monoxide Sensor】
✔ Detects CO Gas Concentrations (20-2000ppm)
✔ Dual Output: Analog & Digital
✔ Fast Response & High Sensitivity
✔ Heating Time: 60s (Preheat Required)
✔ Operating Voltage: 5V DC
✔ Ideal for Safety Alarms & Air Quality Monitors