MQ-3 Alcohol Ethanol Gas Sensor Module

Specification: The MQ-3 is a metal-oxide semiconductor gas sensor designed to detect ethanol concentrations in the air with high sensitivity and fast response times. In a laboratory setting, it is primarily used for monitoring alcohol vapor levels, breathalyzer prototyping, and educational experiments involving volatile organic compound (VOC) detection.

Technical Specifications:
* Target Gas: Alcohol (Ethanol)
* Detection Range: 0.05 mg/L to 10 mg/L
* Heater Voltage: 5.0V ± 0.2V (AC/DC)
* Loop Voltage: ≤ 24V (DC)
* Load Resistance: Adjustable (typically 200kΩ)
* Heater Resistance: 31Ω ± 3Ω (at room temperature)
* Sensitivity (Rs): 2kΩ - 20kΩ (in 0.4 mg/L alcohol)
* Response Time: ≤ 10s
* Recovery Time: ≤ 30s
* Operating Temperature: -10°C to +50°C
Dimension: 22.5x32.5x23mm
Package: 8.5*9.4cm
Weight: 7gm