MQ3 Alcohol Sensor Module

MQ-3 Alcohol Ethanol Sensor Module Gas Detector Sensor MQ3 Specifications: 1.Heater voltage: 5?0.2V (AC?DC) 2.Loop voltage: ?24V (DC) 3.Load resistance: adjustable 4.Heating Resistance: 31??3? (Room temperature) 5.Heating Power: ? 900mW 6.Surface thermal resistance: 2Kohm-20Kohm (0.4mg/L alcohol) 7.Sensitivity: Rs (in air)/Rs (0.4mg/L alcohol) ? 5 8.Working temperature: 20 degree ?2 degree 9.Humidity: 65%?5%RH Features: 1.Signal output light indicator. 2.Analog and level signal output. 3.TTL output valid signal is low. (When the output low signal light can be directly connected microcontroller or relay module). 4.The carbon monoxide detection with better sensitivity. 5.Has a long service life and reliable stability. 6.Rapid response recovery features

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