MQ-2 Propane Gas Sensor Liquefied Petroleum Gas and Hydrogen
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Air freight costs are based on the weight of the product (including packaging bags and cushioning materials). For products under 2kg, freight is calculated in 50g increments. For products between 2kg and 4kg, freight is calculated in 100g increments. For products over 4kg, freight is calculated in 1kg increments.
If your order exceeds 4kg or the shipping cost exceeds $70, we recommend contacting our customer service for an accurate shipping quote. You will need to provide your zip code address when you contact us.
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 |
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| 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-2 gas sensor uses tin dioxide (SnO2), a gas-sensitive material with low conductivity in clean air. When combustible gases are present in the sensor's environment, the sensor's conductivity increases with the concentration of those gases in the air.
A simple circuit can convert this change in conductivity into an output signal corresponding to the gas concentration. The MQ-2 gas sensor is highly sensitive to liquefied petroleum gas (LPG), propane, and hydrogen, and is also ideal for detecting natural gas and other combustible vapors. This sensor can detect a variety of combustible gases and is a low-cost sensor suitable for a wide range of applications.
Input voltage: DC5V Power consumption (current): 150mA
DO output: TTL digital 0 and 1 (0.1V and 5V)
AO output: 0.1-0.3V (relatively pollution-free), maximum concentration voltage around 4V
Special reminder: After the sensor is powered on, it needs to warm up for about 20 seconds for the measured data to stabilize. Sensor heating is normal because it contains an internal heating element; however, if it becomes too hot to touch, it is abnormal.
Wiring method:
1. VCC: Connect to the positive terminal of the power supply (5V)
2. GND: Connect to the negative terminal of the power supply
3. DO: TTL switch signal output
4. AO: Analog signal output
It can be used as a gas leak monitoring device in homes and factories, and is suitable for detecting liquefied gas, butane, propane, methane, smoke, etc.
Detection concentration: 300-10000ppm (combustible gas)
Heating resistance: 31Ω ± 32Ω (room temperature)
Heating power consumption: ≤900mW
Sensitive element surface resistance: 2KΩ 2-20KΩ (in 2000ppm C3H8)
Sensitivity: Rs(in air)/Rs(1000ppm isoalkane) ≥ 5
Concentration slope: ≤0.6 (R 3000ppm/R 1000ppm C3H8)
Temperature and humidity: 20℃ ± 2℃; 65% ± 5%RH
Preheating time: For first-time use or after a long period of non-power-on, at least 48 hours are required. For daily use, a 2-5 minute warm-up is usually sufficient to reach a stable operating state after powering on.