This Gravity Arduino sensor is a great choice for detecting CO and combustible gases. It uses the MQ-9 element to detect Carbon Monoxide accurately. With its low cost, it can be applied in various scenarios. The core sensing material of the MQ-9 is SnO2, which has low conductivity in clean air. It detects gases by cycling between high and low temperatures. At low temperature (heated by 1.5V), it detects CO, and the conductivity increases as the gas concentration rises. At high temperature (heated by 5.0V), it detects Methane, Propane and other combustible gases and cleans adsorbed gases from the low - temperature phase. You can adjust the sensitivity via the potentiometer, and the output is proportional to the gas density. Use analog reading to get data from the sensor. To make it easy to use, it has a Gravity Interface for plug - and - play, and it pairs well with the Arduino IO expansion shield. Applications include domestic gas leakage detection, industrial gas monitoring, and portable gas detection. Specifications: 5V power supply, analog interface, semiconductor sensor type, sensitive to CO and combustible gases (10 - 1000ppm CO, 100 - 10000ppm combustible gas), long life, and a size of 36.4x26.6mm(1.43'x1.05'). Included in the shipping are an Arduino CO Gas Sensor (MQ9) and a Gravity Analog Cable, along with useful documents like Wiki Doc, Schematic, and MQ9 Datasheet.
Using this sensor is easy. First, connect it to your Arduino using the Gravity Analog Cable and the Arduino IO expansion shield. It has a plug - and - play feature thanks to the Gravity Interface. To start detecting gases, power it with 5V. You can adjust the sensitivity of the sensor using the potentiometer according to your needs. Read the gas data through analog reading. When using it at home, place it in areas where gas leakage might occur. In an industrial setting, install it in locations where gas emissions are possible. For maintenance, keep the sensor clean. Avoid exposing it to extreme temperatures or harsh chemicals. If the sensor is not used for a long time, store it in a dry and clean place. Make sure to refer to the MQ9 Datasheet and Schematic for more detailed information.
