sensors
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MQ303A Semiconductor Alcohol Gas Sensor for Breathalyzer & Arduino Projects
SKU: BBZ-SEGA-003• Available on Backorder
₹179
Key Highlights
- ✓High sensitivity to alcohol vapors
- ✓ Fast response and quick recovery time
- ✓ Compact, lightweight design for portable use
- ✓ Low-cost solution for alcohol detection
- ✓ Simple interface with analog circuitry
- ✓ Stable and reliable performance
- ✓ Ideal for battery-powered and handheld devices
1
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Model Type
MQ303B / MQ303A
Sensor Type
Semiconductor Alcohol Gas Sensor
Target Gas
Alcohol (Ethanol – C₂H₅OH)
Detecting Range
20 ~ 500 ppm alcohol
Standard Encapsulation
Metal
Operating Voltage
Compatible with 5V systems
Heater Voltage
≤ 6V DC
Load Resistance
Adjustable
Sensitivity
R₀ (air) / Rₛ (125 ppm C₂H₅OH) ≥ 3
Standard Test Conditions
20°C ±2°C, 55% ±5% RH
Response Type
Conductivity increases with alcohol concentration
Form Factor
Mini size (ideal for portable devices)