ITEM NAME:MQ-9 MQ9 Carbon Monoxide Combustible Gas Sensor Module for Arduino DC5V qwe Descriptio n Description: Module features: High quality dual panel design with power indicator and TTL signal output indication; The switching signal has a DO (TTL) output and an analog output AO; The TTL output valid signal is low. (Low level signal when the output lamp can be directly connected to the microcontroller or relay module) Good sensitivity for carbon monoxide detectors. There are four screw holes for easy positioning; Long life, stable and reliable Rapid response and recovery characteristics Electrical characteristics: Input voltage: DC5V power consumption (current): 150mA DO output: TTL numbers 0 and 1 (0.1 and 5V) AO output: 0.1-0.3V (relative to pollution), the maximum voltage concentration is about 4V Special note: After the sensor is energized, it needs about 20S preheating, the measurement data is stable, and the thermal sensor is normal, because the internal heating wire is not normal. Introduction to MQ-9 sensors: The gas sensing material used in the MQ-9 gas sensor is tin dioxide (SnO2) with lower conductivity in clean air. The low-temperature (1.5V heating) is used to detect carbon monoxide by high-temperature cycle detection method. The conductivity of the sensor increases with the increase of the concentration of carbon monoxide gas in the air. The high temperature (5.0V heating) detects the smoldering of the combustible gas methane and propane and cleans the low temperature. gas. The change in conductivity can be converted to an output signal corresponding to the gas concentration using a simple circuit. The MQ-9 gas sensor is highly sensitive to carbon monoxide, methane, and liquefied gases. This sensor can detect a variety of gases containing carbon monoxide and flammability. It is a low-cost sensor suitable for a variety of applications. Specifications: Color: Picture Color Size: 32*20*16mm Package Included: 1 * MQ-9 Gas Sensor Module Note: Please be re.The gas sensing material used in the MQ-9 gas sensor is tin dioxide (SnO2) with lower conductivity in clean air. The conductivity of the sensor increases with the increase of the concentration of carbon monoxide gas in the air.
