MQ3 Alcohol Sensor
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Air freight options include DHL, UPS, FedEx, and Yun Express, with a delivery time of 7-12 days.
When the weight of the express delivery exceeds 12kg or air shipping cost exceeds US$100 or sea shipping cost exceeds US$50, you can choose B2B shipping:
Air freight(10-14 days)
Yun quik boat sea freight (15-20 days)
Quik boat sea freight(20-25 days).
Air freight B2B express |
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| US Area | Unit Price | Date | Last-mile Delivery |
| Western United States (zip codes starting with 8 or 9) |
US$7.5/kg + US$2 | 10-15 days | UPS / FEDEX / GOFO |
| Central United States (zip codes starting with 4, 5, 6, or 7) |
US$8.5/kg + US$2 | ||
| Eastern United States (zip codes starting with 0, 1, 2, or 3) |
US$9.0/kg + US$2 | ||
Yun quit boat sea freight B2B express |
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| US Area | Unit Price | Date | Last-mile Delivery |
| Western United States (zip codes starting with 8 or 9) |
US$3.4/kg + US$2 | 15-20 days | UPS / FEDEX / GOFO |
| Central United States (zip codes starting with 4, 5, 6, or 7) |
US$3.6/kg + US$2 | ||
| Eastern United States (zip codes starting with 0, 1, 2, or 3) |
US$3.8/kg + US$2 | ||
Quit boat sea freight B2B express |
|||
| US Area | Unit Price | Date | Last-mile Delivery |
| Western United States (zip codes starting with 8 or 9) |
US$2.6/kg + US$2 | 20-25 days | UPS / FEDEX / GOFO |
| Central United States (zip codes starting with 4, 5, 6, or 7) |
US$2.8/kg + US$2 | ||
| Eastern United States (zip codes starting with 0, 1, 2, or 3) |
US$3.0/kg + US$2 | ||
Processing starts after your payment confirmed. Normally, it needs 2-5 days. The processing time depends on the quantity of items.
The MQ-3 gas sensor uses tin dioxide (SnO2), a gas-sensitive material with low conductivity in clean air. When alcohol vapor is present in the sensor's environment, the sensor's conductivity increases with increasing alcohol concentration. A simple circuit converts this conductivity change into an output signal corresponding to the gas concentration. The MQ-3 gas sensor has high sensitivity to alcohol and is resistant to interference from gasoline, smoke, and water vapor. This sensor can detect various concentrations of alcohol and is a low-cost sensor suitable for a variety of applications.
Alcohol (ethanol) detection is used for on-site detection of drivers and other personnel prohibited from working under the influence of alcohol, as well as for detecting ethanol vapor in other locations.
Module Features:
1. High-quality double-sided panel design with power indicator and TTL signal output indicator;
2. DO switch signal (TTL) output and AO analog signal output;
3. TTL output valid signal is low level. (The indicator light illuminates when the output is low, allowing direct connection to a microcontroller or relay module.)
4. Analog output voltage; the higher the concentration, the higher the voltage.
5. Good sensitivity for alcohol detection.
6. Four screw holes for easy positioning;
7. Product dimensions: 32(L)*20(W)*22(H)
8. Long service life and reliable stability
9. Fast response and recovery characteristics
Electrical Performance:
Input Voltage: DC5V
Power Consumption (Current): 150mA
DO Output: TTL digital 0 and 1 (0.1 and 5V)
AO Output: 0.1-0.3V (relatively pollution-free), maximum concentration voltage around 4V
Special Reminder: After powering on, the sensor needs to warm up for about 20 seconds for the measured data to stabilize. Sensor heating is normal due to the internal heating element; if it becomes too hot to touch, it is abnormal.
Gas: Alcohol (ethanol)
Detection Range: 10～1000ppm alcohol
Characteristic Gas: 125ppm alcohol
Sensitivity: R in air/Rin typical gas≥5
Sensitive Element Resistance: 1～20KΩ in air
Response Time: ≤10s (70% Response)
Recovery Time: ≤30s (70% Response)
Heating Resistance: 31Ω±3Ω
Heating Current: ≤180mA
Heating Voltage: 5.0V±0.2V
Heating Power: ≤900mW
Measurement Voltage: ≤24V
Operating Conditions:
Ambient Temperature: -20℃～+55℃
Humidity: ≤95%RH
Ambient Oxygen Content: 21%
Storage Conditions:
Temperature: -20℃～+70℃
Humidity: ≤70%RH
Wiring Method:
1. VCC: Connect to the positive power supply (5V)
2. GND: Connect to the negative power supply
3. DO: TTL switch signal output
4. AO: Analog signal output