3pcs MQ-9 Carbon Monoxide Flammable CO Gas Sensor Module Shield Liquefied Electronic Detector Module Geekcreit for Ardui

Features Sensitive material MQ 9 gas sensor is used to clean the air in the lower conductivity of tin dioxide SnO2 Detection method using low temperature cycling 1 5V heating to detect carbon monoxide conductivity sensors with carbon monoxide in the air increased with increasing gas concentration spurious adsorption at high temperatures 5 0V heating detection of combustible gases methane propane and cryogenic cleaning gases Simple circuit can be used to change the conductivity concentration of the gas is converted to the corresponding output signal MQ 9 high gas sensor for carbon monoxide methane liquefied petroleum gas sensitivity the sensor can detect a variety of gases containing carbon monoxide and flammable is a low cost sensors for a variety of applications Speciffications 1 It adopts high quality double panel design with power indication and TTL signal output indication 2 It has DO switch signal TTL output and AO analog signal output 3 The TTL output valid signal is low When the output is low the signal light is on it can be directly connected to the MCU or relay module 4 The voltage of the analog output the higher the concentration the higher the voltage 5 It has good sensitivity to gas and natural gas detection 6 there are four screw holes for easy positioning 7 product dimensions 32 L 20 W 22 H 8 has a long life and reliable stability9 fast response recovery characteristics Electrical Performance Dectio