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MQ3 Alcohol Gas Sensor Specifications and Features:

• Model No.: MQ-3
• Dimensions: 36 x 20 x 21 mm (LxWxH)
• Weight: 6gm
• Heater voltage: 5±0.2V (AC•DC)
• Loop voltage: ≤24V (DC)
• Load resistance: Adjustable
• Heating Resistance: 31Ω±3Ω (Room temperature)
• Heating Power: ≤ 900mW
• Surface thermal resistance: 2Kohm-20Kohm (0.4mg/L alcohol)
• Sensitivity: Rs (in the air)/Rs (0.4mg/L alcohol) ≥ 5
• Working temperature: 20 degrees ±2 degree
• Humidity: 65%±5%RH
• Signal output light indicator.
• Analog and level signal output.
• TTL output valid signal is low. (When the output low signal light can be directly connected microcontroller or relay module).
• The carbon monoxide detection with better sensitivity.
• Has a long service life and reliable stability.
• Rapid response recovery features.