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DSM501A PM2.5 Dust Sensor Module for Arduino, Air-ConditionersFeatures-PWM output modeCompact, lightweightEasy to installA single power supply

MQ 135 Air Quality/Gas Detector Sensor Module For ArduinoFeatures-Sensitivity to Ammonia, Sulphide, and Benzene steamWith signal output instructionsTh..

MQ-7 CO Carbon Monoxide Coal Gas Sensor ModuleFeatures-The analog output voltage, the higher the concentration the higher the voltage.The carbon monox..

PM2.5 GP2Y1010AU0F Dust Smoke Particle SensorFeatures-Compliant with RoHS directive (2002/95/EC)Compact, thin package (46.0 × 30.0 × 17.6 mm)Low consu..

SeeedStudio Grove Air quality sensor v1.3Features-Responsive to a wide scope of target gasesCost-efficientDurableCompatible with 5V and 3.3V