A
Anonymous
Mar 09, 2026
Rating: 5/5
Perfect for learning
Works great with Arduino IDE examples. Very easy to set up for beginners.
Description
MQ-2-135-3-7-9 Smoke Air Probe - Specializing in Components for 20 Years
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Compatible Sensor Models | MQ-2, MQ-3, MQ-7, MQ-9, MQ-135 |
| Operating Voltage | 5V DC |
| Output Interface | Digital (TTL) and Analog (0-5V) |
| Sensitivity Control | Adjustable Potentiometer |
| Response Time | Less than 10 Seconds |
| Heating Voltage | 5.0V ± 0.1V |
| Circuit Board Material | FR-4 PCB |
| Pin Header Type | 4-Pin Male Header |
| Operating Temperature | -10°C to 50°C |
| Recommended Use | Prototyping and Educational Projects |
5 reviews
A
Anonymous
Mar 02, 2026
Rating: 5/5
Reliable output
Analog readings are consistent after the initial burn-in period. Good value for money.
A
Anonymous
Feb 27, 2026
Rating: 4/5
Good but hot
The sensor gets quite warm during operation which is normal, but worth noting for enclosed projects.
A
Anonymous
Feb 07, 2026
Rating: 5/5
Great value
Cheaper than buying individual sensors elsewhere. Works perfectly with my ESP8266.
A
Anonymous
Jan 27, 2026
Rating: 5/5
Fast shipping
Module arrived well packaged and undamaged. Pins were straight and ready to use.
5 FAQ
Q: Is this module compatible with 3.3V logic microcontrollers?
A: The module operates at 5V. You may need a logic level converter when interfacing with 3.3V MCUs.
Q: Can I use this for a certified home safety alarm system?
A: No, these are for prototyping only. Please use certified industrial equipment for critical safety applications.
Q: What is the expected lifespan of the sensor element?
A: Typically 1 to 2 years depending on the usage environment and gas exposure levels.
Q: Are code examples included with the purchase?
A: Yes, basic examples and library links are provided in the product description documentation.
Q: Which model should I choose for detecting Methane?
A: The MQ-2 model is suitable for detecting methane, LPG, and propane gases.
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