Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Sensor Model | MQ-2 (Selectable Variants Available) |
| Operating Voltage | 5V DC |
| Output Signal | Analog & Digital TTL |
| Interface Pins | 3-Pin Header (VCC, GND, OUT) |
| PCB Dimensions | 32mm x 20mm |
| Mounting Hole Diameter | 3mm |
| Preheat Time | 24-48 Hours |
| Comparator Chip | LM393 |
| Compatibility | Arduino, ESP32, Raspberry Pi |
| Package Weight | 15 grams |
Anonymous
Apr 10, 2026
Rating: 4/5
Good value
Sensitivity needs calibration but overall solid build quality. Pins were straight and soldering was clean.
Anonymous
Mar 31, 2026
Rating: 5/5
Perfect for alarm system prototype
Used this for a home safety prototype. Digital output is reliable. Note: Not for certified safety systems, but great for learning.
Anonymous
Mar 22, 2026
Rating: 3/5
Warm up time is long
Make sure to let it preheat as stated in the docs. Otherwise works fine. Just be patient before expecting accurate readings.
Anonymous
Mar 10, 2026
Rating: 5/5
Fast shipping
Arrived quickly. Pin headers were included which was nice. Saved me some time on assembly.
Anonymous
Feb 22, 2026
Rating: 5/5
Great for Arduino projects
Works well with my Uno. Detected smoke easily during testing. The digital output threshold is adjustable via the potentiometer.
Q: How long is the typical lifespan of the sensor?
A: Lifespan varies based on usage, but typically they last 1-2 years in continuous operation before sensitivity degrades.
Q: Is calibration required before use?
A: Yes, you should use the onboard potentiometer to adjust the sensitivity threshold based on your environment.
Q: Can this be used for safety critical alarms in a home?
A: No, this module is designed for prototyping and hobby use only. It is not certified for life-safety applications.
Q: Which gas does the MQ-2 model detect specifically?
A: The MQ-2 is primarily sensitive to smoke and combustible gases like LPG, butane, and propane.
Q: Does this work with 3.3V logic microcontrollers?
A: The module operates at 5V, but the output signal can generally be read by 3.3V boards. Please check your specific board's voltage tolerance.
CANDLE.LAB | Non-Bleeding, Non-Seeping DIY Scented Candle Solid Thread Pigment - Fluorescent Dye Colors
$12.80
Small-Scale Yogurt Production Line, Pasteurized Milk Processing Equipment, Yogurt Sterilization and Fermentation Tank
$1,260.00
Blue Field Outdoor Lightweight Wear-Resistant Waterproof Dry Bag for Rafting and Stream Trekking, Storage Pouch for Miscellaneous Items, 10L/20L/40L/70L
$14.00
![[All-Inclusive Flat Rate] Single Imported Dental Implant | Includes Free Cleaning, Abutment, Fixture, and Crown](https://www.gosteppe.com/cache/small/product/268875/legacy-main-9f3e40fd1d280ff9fe710fa3.webp)
[All-Inclusive Flat Rate] Single Imported Dental Implant | Includes Free Cleaning, Abutment, Fixture, and Crown
$1,800.00
Acrylic Markers for Kids, Washable Art Watercolor Pens for Elementary Students, Opaque and Layerable, Direct Liquid Ink Core
$19.90
304 Stainless Steel Chain - Long/Short Link Lifting Chain, Hoist Chain, Clothesline, Swing, Pet Chain, Anti-Theft Chain
$1.53
Face Towel Storage Box for Disposable Cleansing Tissues and Cotton Pads, Wall-Mounted Bathroom Organizer
$19.90
France Arches Watercolor Paper Handmade 100% Cotton Artist Grade Sample Sheets Loose Paper 300G 640G Full Sheet Half Sheet 4K 8K 16K Medium and Rough Texture Watercolor Paint Paper
$20.80
Premium Ceramic Tea Canister Gift Box – Empty Packaging for Black, Pu'er, White, and Biluochun Tea
$121.00
Rechargeable Gen 2 Personal Air Purifier with Auto Fan for Travel, Commute, and Flights
$145.00
Roast Duck Warmer Cabinet, Constant Temperature Box, Commercial Crispy Pork Belly Hanging Duck Cabinet, Roasted Chicken and Cooked Food Display Warmer
$318.00
Guangda Dental | Straumann Implant Services for Missing Teeth Restoration (Foshan Branch Only)
$2,052.00
Painted Wooden Colored Pencils Set with Gold Powder, Creative Engineering Pencils for Gongbi Coloring, Basic Packaging
$11.12
South Korea Dentium Dental Implant Abutment with Full Ceramic Crown for Missing Tooth Restoration
$1,980.00
Balloon Warm Star Pre-order Unspoken Words Phase 3 17 Years Old Little Bean 'Chance Encounter' Series Merchandise
$22.00
Tissue Holder Magnetic Punch-free for Mirror Cabinets
$5.73
Industrial Scouring Pad Roll – Abrasive Brushed Cloth for Stainless Steel Polishing and Finishing
$20.00
DIY Aromatherapy Candle Wax Melting Cup – Stainless Steel Handle Heating Pot with Multi-Size Measuring Spoons and Color Mixing Cup
$5.78
7-Piece Square Pot Set B with Tray, Plastic Colorful Succulent Pots, Simple and Durable Design for Root Explosion and Control, White Square Pots
$53.00
Multi-Layer Over-Toilet Storage Rack, Floor-Standing Laundry Organizer for Bathroom, Balcony, No-Drill Installation
$31.42
Feiyue Car Tires: Sizes 205, 195, 215, 255; Longteng Series 45, 50, 25, 65, 60R16, 17 Rim 8
$485.00
2 Pieces Free Shipping Outdoor Rafting Creek Swimming Gear Dustproof Waterproof Bag Wearable or Handheld Ultra-Light Storage Sack
$8.50
![[Dental Implant Chief Specialist] Implant Examination and Treatment Planning](https://www.gosteppe.com/cache/small/product/268856/legacy-main-c23225af0fb2c31bbd4f46a1.png)
[Dental Implant Chief Specialist] Implant Examination and Treatment Planning
$9.90
Wall-Mounted Toilet Storage Rack - No-Drill Bathroom Shelf Organizer for Above the Toilet
$26.07
New Wireless Car Vacuum Cleaner, High Suction Home Use, Compact Handheld Silent High-Power Vacuum
$114.00
Electric Watercolor Spray Pen Children Hand-painted Color Pa
$47.55
Cement-Specific Pigment Powder for DIY Crafts, Gypsum Dye for Creative Flower Pot Coloring
$3.83
9 Garrett iCover 270 Twin 5RX Restech 072.6S28 Turbocharger 20-Dragon 0TXD GT 37042
$6,755.00
Household Small Range Hood, Portable USB Desktop Fume Extractor for Living Room Hot Pot and BBQ Odor Removal, Mini Smoke Absorber
$41.00
Retainer Storage Box, Clear Case for Invisible Aligners with Mirror, Portable Orthodontic Appliance Carrier, Instagram Style
$13.40
![[Corrosion-Resistant] DFRobot Capacitive Soil Moisture Sensor Module Dry/Wet Detection](https://www.gosteppe.com/cache/medium/product/3259/legacy-main-2f0d3454b36b32391d263648.webp)
