Product Introduction
- 1.Alcohol Sensor MQ303B Product Description
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MQ303B is a tin dioxide semiconductor typealcohol gas sensorwith high sensitivity and fast response to alcohol, suitable for portable alcohol detectors, automotive ignition systems, and more.
- 2.Alcohol Sensor MQ303B Features
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High Sensitivity
Fast Response and Recovery
Long Life, Low Power Consumption and Cost
Compact Size
- 3.Alcohol Sensor MQ303B Main Applications
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Portable alcohol detectors and automotive ignition systems, etc.
- 4. Alcohol Sensor MQ303B Technical Specifications
| Product Model |
MQ303B |
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| Product Type |
Semiconductor Gas Sensing Element |
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| Standard Package |
Metal Package |
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| Detection Gas |
Alcohol |
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| Detection Concentration |
20-1000ppm Alcohol |
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| Standard Circuit Conditions |
Heater Voltage |
V H |
0.9V ± 0.1V AC or DC |
| Circuit Voltage |
Vc |
≤6V DC |
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| Load Resistance |
R L | Adjustable |
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| Heater Resistance |
R H |
4.5W ± 0.5 W (Room Temperature) |
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| Heater Current |
IH |
120±20mA |
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| Heater Power |
PH |
≤ 140 mW |
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| Gas Sensing Element Characteristics under Standard Test Conditions |
Element Power Consumption |
PS |
≤10 mW |
| Surface Resistance of Sensing Body |
Rs |
4KΩ-400KΩ(in air) |
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| Sensitivity |
S |
Rs(in air)/Rs(125ppm alcohol) ≥ 3 |
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| Concentration Slope |
α | 0.50 ± 0.15 (R300ppm/R100ppm alcohol) |
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| Standard Test Conditions |
Temperature, Humidity |
20℃±2℃； 65%±5%RH |
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| Standard Test Circuit |
Vc:3.0 V±0.1 V DC ； VH: 0.9 V±0.1 V DC |
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| Preheating Time |
No less than 48 hours |
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