Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | MQ-2 |
| Detection Gases | LPG, Propane, Hydrogen, Smoke |
| Operating Voltage | 5V DC |
| Output Signal | Digital (DO) and Analog (AO) |
| Interface Type | 3-Pin Header (VCC, GND, OUT) |
| Compatibility | Arduino Uno R3, Mega, Nano, Raspberry Pi |
| Protection Feature | Reverse Connection Protection |
| Adjustable Sensitivity | Yes, via onboard potentiometer |
| Preheat Time | Approx. 24 hours for stable readings |
| Package Contents | 1x MQ-2 Sensor Module, 1x Pin Header Strip |
Anonymous
Mar 26, 2026
Rating: 5/5
Easy integration
Integrated this into my smart home system without issues. The analog output allows for precise monitoring of gas concentration levels, not just a binary alarm.
Anonymous
Mar 25, 2026
Rating: 4/5
Works as described
Found plenty of libraries online to get this running quickly. The digital output threshold is easy to set with the small screw on the board. Solid component.
Anonymous
Mar 23, 2026
Rating: 5/5
Perfect for my home safety project
This sensor works flawlessly with my Arduino Uno. The reverse connection protection gave me peace of mind while wiring it up for the first time. Detection is quick and the sensitivity adjustment is very responsive.
Anonymous
Mar 14, 2026
Rating: 4/5
Great value, needs warm-up
Good quality module for the price. Just remember to let it preheat for a day before calibrating, otherwise the readings drift. Once settled, it detects smoke from a match instantly.
Anonymous
Mar 12, 2026
Rating: 5/5
Sensitive and accurate
Tested against a commercial detector and this module triggered at similar levels. Excellent for prototyping fire alarm systems. Shipping was fast too.
Anonymous
Mar 08, 2026
Rating: 5/5
Reliable for classroom kits
We bought ten of these for our robotics club. They are durable and the pin layout makes breadboarding easy. No failures so far after three months of student use.
Q: Can this detect natural gas leaks specifically?
A: The MQ-2 is primarily sensitive to LPG, propane, and hydrogen. While it may react to natural gas (methane), the MQ-5 or MQ-6 models are optimized specifically for methane and natural gas detection.
Q: What is the purpose of the reverse connection protection?
A: This feature prevents damage to the sensor module if you accidentally swap the VCC and GND wires during installation. It adds an extra layer of durability for beginners.
Q: Does this module work with 3.3V logic boards like the ESP32?
A: Yes, but since the module operates at 5V, you may need a logic level converter for the signal pins if your board is strictly 3.3V tolerant. The VCC should generally remain at 5V for the heater element.
Q: Is the pin header included in the package?
A: Yes, the package includes a strip of 3-pin headers that you can solder onto the module for easy breadboard usage.
Q: How long does the sensor need to preheat before use?
A: For initial stabilization, we recommend powering the sensor for 24 to 48 hours. After the initial burn-in, it typically only requires a few minutes of warm-up time upon subsequent power cycles.
Bull Socket Storage Box - Multi-Outlet Power Strip with Cord, Home Multifunctional Desktop Cable Organizer, Power Junction Board
$85.90
Used Car Tires 80-90% New, Sizes 165/185/195/205/215/235/60/70/75 R13/R14/R15
$65.00
BBP Angular Contact Ball Bearings 7000 7001 7002 7003 7004 7005 7006-E-J
$14.08
Baby Rattle with Teether for 0-1 Year Olds; Ideal Gift for Children's Day
$14.80
Meiyike Granular Sheep Manure Fertilizer, Fermented and Composted for Vegetables and Flowers, Home Potted Plants, Garden Soil Activator
$37.54
Face Towel Storage Box Wall-Mounted Bathroom Tissue Holder
$2.98
Baby Rattle Toy - Chewable Wooden Handheld Drum with Sheepskin, Traditional Newborn Toy for Boys and Girls
$13.00
Mineral Water Bucket Inverted Stand 6L Bottle Pump Dispenser Manual Pressure Water Extractor for Water Coolers
$2.09
Marie's Sketch Blending Stumps & Makeup Sponges – Professional Art Supplies for Students
$6.06
Compact Home Range Hood, Portable USB Desktop Smoke Extractor for Hot Pot and BBQ Odor Removal
$39.00
Wen Zhengming Small Regular Script: Three Versions of Thousand Character Classic, Two Versions of Red Cliff Ode, Close-Up Copying Cards, Wen Zhengming Calligraphy Model Book
$10.00
Custom Name Stamp, Personalized Seal, Photo-Sensitive Signature Stamp
$7.04
Variable Frequency Drive Accessory RMIO Flat Cable for ACS800
$120.00
Qimeng Island WAKUKU 'Start Cheating Now' Series Blind Box, Celebrity Style Plush Toy
$69.00
Orthodontic Invisible Aligner Case Retainer Storage Box Teeth Corrector Denture Compact Portable Cleaning Box
$12.30
Sentury 990 Silent Tire - Sizes 185/195/205/215/225/50/55/60/65 R16/R17/R18/R19
$342.00
Adult Outdoor Rafting Gear – Large PVC Mesh Waterproof Dry Bag for Swimming and River Trekking
$7.26
Universal Reading Pen Storage Rack – Compatible with Xiao Ji Qiu Qiu, Tun Xiao Meng, Caterpillar, and JOJO Reading Pens
$10.80
![[Daimai Holds Micro-Needle Hair Transplant Patent] Micro-Needle Artistic Hairline Planting, 3000 Grafts for Hair Loss Treatment](https://www.gosteppe.com/cache/small/product/268890/legacy-main-a2a0f70c2e837e7e69cf16aa.webp)
[Daimai Holds Micro-Needle Hair Transplant Patent] Micro-Needle Artistic Hairline Planting, 3000 Grafts for Hair Loss Treatment
$71,950.00
PELICAN Air 1535 Lightweight Protective Case, Waterproof Photography Gear Carry-On Luggage with Free Shipping
$219.00
Beginner Calligraphy Set: Tian Yingzhang Ou Style Kaishu Copybook, Xuan Paper, and Red-Guided Practice Kit
$9.90
Three-Phase AC Permanent Magnet Synchronous Motor 15KW 380V Variable Frequency
$3,493.00
Genuine OEM Car Tires for Pickups, SUVs, and Vans - Sizes 145, 155, 165, 175, 185, 195 R12
$60.00
Freestanding Toilet Storage Rack - No-Drill Bathroom Organizer with Tank Shelf and Tissue Basket
$19.04
Packaging Machine for Salted Duck Eggs and Chicken Wings, Adjustable Frequency Speed MFL Drying Unit, Manufacturer Discount
$37,800.00
Portable Retainer Storage Case – Compact Box for Children's Orthodontic Appliances and Invisalign Aligners
$13.30
Tang Dynasty Ouyang Xun 'Stele of Lord Huangfu' Calligraphy Copybook, Close-Up Tutorial, Single Volume 79 Pages
$9.90
Marco Sketchbook - 8K Sketch Paper, 16K Colored Pencil Paper, A4 Marker Paper for Art Students and Kids
$9.30
Economic Pasteurization Machine, Commercial Pasteurization Tank, Small Dairy Processing Equipment, Direct from Manufacturer
$3,430.00
Authentic Cat PAI Little Companion Daily Blind Box Figurine, Cute Siamese Cat Desktop Pet, Action Figure Birthday Gift
$8.41
![[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set](https://www.gosteppe.com/cache/medium/product/208273/legacy-main-9ec245ebf781f65a434ba854.webp)
