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.
Language of Drums Motion Path Set Drum Creativity Essence Rhythm Drum Kit Teaching Material Jazz Drum
$59.17
1.9m Wide-Format Sublimation Printer for Pillows, Garments, and Fabric Digital Printing
$600.00
Automatic Retractable Air Hose Reel - Pneumatic Shrinking Hose Drum Combo for Auto Repair (Air, Electric, Water) - National Standard
$228.00
Marie's Paper Blending Stumps Thickened Xuan Paper Blending Stumps Marie's Student Sketch Set Blending Stumps Rubbing Cotton Painting Special Paper Blending Stumps Smudging Pens Art Supplies Xuan Paper Sketch Fixative
$5.09
Inner Mongolia Milk Skin Processing Equipment - Condensed Milk and Butter Production Line, Fully Automatic Cheese Making Machine
$13,580.00
Yijiayi Plastic Surgery - Hair Follicle Analysis to Assess Growth, Prevent Hair Loss, and Plan Transplants
$10.00
Hell Training Rock Guitar by Shinichi Kobayashi - Electric Guitar Speed Playing Tutorial
$106.00
Mai Da Chu Commercial Food Warmer Cabinet, Large-Capacity Constant-Temperature Heating Cart for Banquets, Hotels, and Kitchens
$8,165.00
Children's Activity Appliance Storage Box - Case for Braces, Underbite Correctors, Expanders, and Denture Cleaning
$16.80
Stainless Steel Cable Raceway Arc-Shaped Anti-Step Floor Metal Surface Mount Decorative Invisible Wire Channel
$2.50
Electric Watercolor Spray Pen Children Hand-painted Color Pa
$46.55
408 Fast-Drying Glue - Strong Low-Whitening Instant Adhesive for Metal and Plastic, Heat Resistant
$53.12
UE5.1-5.7 Ancient Sci-Fi Gate Model Instrument Consultation
$2.00
Biliansheng Hair Transplant - Non-Shave Female Hairline Restoration & Density Enhancement
$19,999.00
Water Brush Pen Set Large Capacity Beginner Gouache Solid Watercolor Paint Brush Tools Line Drawing Art Student
$32.00
Beginner Watercolor Painting Line Art Coloring Book, Hua Meng Lv Ren by Stan, Fine Texture, 2-Pack Free Shipping
$10.60
New Wanli Tire 265/45R21 SU306+ - Compatible with AITO M7, BYD Tang, Range Rover, Li Auto, and NIO
$528.00
Suzhou Factory Wholesale Chain Store Logo - RGB Illuminated Letters, Acrylic Neon Signs for Window and Counter Display
$1,911.00
RoHS 1.0 Environmental Tester for Alloy Analysis and Heavy Metal Detection in Plastic Toys
$15.30
Mont Marte Long-Handle Bristle Brush – Professional Art Brush for Acrylics, Oil Painting, and Flat Wash Techniques
$37,500.00
Portable Plastic Backpack Fertilizer Bucket for Manual Fruit Picking, Seed Feeding, and PPC Fertilization
$9.50
Chinese-Style Hand-Drawn Plant Line Art Coloring Book on 100% Cotton Watercolor Paper
$15.80
Eagle Brand 99021 Industrial Scouring Pads, Cleaning Cloths, and Polishing Pads Supply
$666.00
Pad Printing Machine Parts - Zhongke 4-Inch Blade Clamp, Blade Holder, and Doctor Blade Frame (In Stock)
$4.50
Pneumatic Throttle Valve Quick Connect Fitting SL4-01/4-02/4-03 Air Pressure Regulator Flow Control Valve
$8.60
Pad Printing Silicone Rubber Heads Electric Long Round Square Durable Customizable 30-Year Established Store
$3.00
Specialized Vegetable Growing Box - Foam Balcony Planter, Rectangular Plastic Pot for Home Gardening
$41.70
Candy Naoko Gujima Mr. Saxophone City Pop Sheet Music with Accompaniment Demo
$37.00
Multi-Color Detachable Water Bucket Stand - Office Purified Water Dispenser Holder (Inverted)
$60.95
Oil-Based Original Strong Fast-Drying Adhesive for Metal, Plastic, Rubber, Ceramics, and Wood, Multi-Purpose Transparent Glue (Not 502)
$21.60
![[Corrosion-Resistant] DFRobot Capacitive Soil Moisture Sensor Module Dry/Wet Detection](https://www.gosteppe.com/cache/medium/product/3259/legacy-main-2f0d3454b36b32391d263648.webp)
