The MQ-2 Gas Sensor is a highly versatile and low-cost sensor that can detect a variety of flammable gases, making it an ideal choice for a wide range of applications. This sensor is capable of detecting combustible gases and fumes, with a detectable concentration range of 300-10000ppm for flammable gases. With a working voltage of DC 5V, this sensor is easy to use and integrate into your electrical circuitry. Whether you're working on a DIY project or need to detect gas in an industrial setting, the MQ-2 Gas Sensor is a reliable and cost-effective solution.