Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Sensor Type | MQ-4 Semiconductor Gas Sensor |
| Detectable Gases | Methane, Propane, Butane, LPG, Natural Gas |
| Operating Voltage | 5V DC |
| Output Signal | Digital Switch Output (TTL) and Analog Voltage |
| Preheat Time | 24-48 Hours (Initial) |
| Response Time | < 10 Seconds |
| Recovery Time | < 30 Seconds |
| Sensitivity Adjustment | Potentiometer Included |
| Interface Compatibility | Arduino, Raspberry Pi, STM32, ESP32 |
| Dimensions | 32mm x 20mm x 14mm |
Anonymous
Mar 21, 2026
Rating: 4/5
Good value, just remember to preheat
Great little module for the price. Just a heads up for beginners: you must let it run for at least 24 hours before calibration or your readings will be way off. Once warmed up, it detects propane from my grill tank very reliably.
Anonymous
Mar 16, 2026
Rating: 3/5
Needs careful calibration
The hardware is fine, but getting the right sensitivity took some trial and error. If you set the potentiometer too high, it gives false positives. Once calibrated correctly in a clean air environment, it performs well.
Anonymous
Mar 12, 2026
Rating: 5/5
Works great with Raspberry Pi
Connected this to my Raspberry Pi GPIO pins via an ADC converter. The sensitivity is impressive; it picked up faint gas odors that I could barely smell. Highly recommend for anyone starting with gas detection projects.
Anonymous
Mar 10, 2026
Rating: 4/5
Solid performance for DIY alarms
I built a standalone alarm system using this sensor and a buzzer. It triggers consistently when exposed to butane. The only downside is the power consumption is slightly higher than expected due to the heating element, but that's normal for this sensor type.
Anonymous
Mar 04, 2026
Rating: 5/5
Easy to interface
Used this for a university robotics project involving environmental monitoring. The pinout is standard and the documentation online is plentiful. It responded quickly when I tested it with a lighter (without direct flame contact).
Anonymous
Mar 03, 2026
Rating: 5/5
Perfect for my home safety project
This sensor module works exactly as described. I integrated it with an Arduino to monitor my kitchen for gas leaks. The analog output is stable after the initial preheat period, and the digital threshold is easy to adjust with the onboard potentiometer.
Q: Is the output voltage compatible with 3.3V microcontrollers?
A: The module runs on 5V. While the digital output is often TTL compatible, the analog output may exceed 3.3V limits. We recommend using a voltage divider or a logic level converter when connecting to 3.3V boards like ESP32.
Q: What is the warm-up time before accurate readings can be taken?
A: For initial use, we recommend a preheat time of 24 to 48 hours to stabilize the sensor material. Subsequent power cycles usually require only a few minutes to reach operational stability.
Q: Does this module have a waterproof casing?
A: No, this is a bare PCB module intended for indoor use or integration into a custom enclosure. It is not water-resistant and should be protected from moisture and direct weather exposure.
Q: Does this module come with a heater circuit built-in?
A: Yes, the MQ-4 module includes the necessary heating circuit and operates on a standard 5V supply to maintain the sensor at the required operating temperature.
Q: Can this detect carbon monoxide (CO)?
A: No, the MQ-4 is specifically optimized for combustible gases like methane, propane, and butane. For Carbon Monoxide detection, please consider our MQ-7 or MQ-9 modules.
Magnetic Refrigerator Side Storage Rack - No-Drill Wall Organizer for Spices and Utensils
$9.10
Multi-Function Car Tire Stone Removal Hook Tool for Picking and Digging Out Debris
$7.35
Suction Cup Sink Strainer - Disposable Kitchen Drain Filter for Food Scraps and Waste
$14.30
Kimberly-Clark Wiper Paper, Industrial Cleaning Wipes for Oil and Grease, Factory & Laboratory Use
$963.52
Loose Gold Rutilated Quartz Beads, Donghai Agate, Chalcedony, Jade, Cat's Eye, Titanium Crystal, Aquamarine, White and Yellow Crystal Single Beads for Bracelets
$8.42
Faucet Drain Mat, Non-Slip Countertop Pad for Kitchen and Bathroom, Splash-Proof Sink Organizer, Thickened Mold-Resistant Silicone Mat
$3.78
New Pirelli Tire 255/40R20 101W AO PZERO PZ4 with Silent Cotton Original Fit for Audi A6L
$1,358.00
Oriental Pearl Dual Porcelain Jar Gift Set: Green Tea, Black Tea, Jin Jun Mei, Pu'erh Loose Leaf Tea in Porcelain Jars
$149.00
Purified Water Bucket Stand Inverted Water Dispenser Pump Simple Mineral Water Drinking Machine Press Pump
$10.80
New Children's Gouache Paint Brushes DIY Hand-Painted Graffiti Art Class Watercolor Acrylic Paint Brushes Bristle Round Tip Brush
$6.41
Natural Clear Quartz Fully Clean Untreated Faceted Round Rice Beads - For Women's Bracelets, Spacer Beads, and DIY Crafts
$6.63
Sponge Brushes for Kids' Crafts and Creative Painting - Student Art Stamping Tools, DIY Sponge Paintbrushes
$13.86
Jiuchenggong Liquan Ming Tang Dynasty Ouyang Xun Yao Mengqi Copybook, Regular Script Brush Calligraphy Workbook, 3 Volumes, 188 Pages
$17.90
Shaped Watercolor Paper Ticket Stubs - Blank Postage Stamp Bookmarks with Serrated Edges, Thickened 300g Premium Cotton Pulp, Fine Texture for Art Hand Painting, Easy Blending, High Absorbency, Wrinkle-Resistant - Perfect for Postcards and Creative Cards
$9.85
Naitong Automatic Retractable Air Hose Reel with PU Braided Hose for Pneumatic Tools and Car Detailing
$119.00
Premium Wall-Mounted Aromatherapy Empty Bottle – 100ML Plastic Square Diffuser Bottle with Wall-Mount Adhesive Sticker
$2.98
Leyingfang Floating Pen for Kids' Water Drawing, Colorful Water-Soluble Suspended Markers, Erasable Watercolor Pens
$13.80
Loose Rose Quartz Beads, Donghai Agate, Chalcedony, Jadeite, and Madagascar Pink Crystal for DIY Jewelry Making
$6.72
Expandable Stainless Steel Sink Rack, Multi-Function Kitchen Drain Board for Fruits, Vegetables, and Utensils
$14.90
Transparent Retainer Case Aligner Storage Box Portable Carry-On Squeeze Bag Orthodontic Appliance Rubber Band Cleaning Box
$18.50
Transparent Data Cable Organizer Bag for Travel - Portable Multi-Use Visible Storage for Digital Chargers and Cable Management
$7.36
Finished Seal Calligraphy Finished Stone Stamp Sellos Chines
$108.58
Chunfei Grocery Store Commuter Hard Fork Low-Beam Mountain Bike for Urban Roads, Suburbs, School, and Outings
$2,247.00
6-Cavity Large Square French Flower DIY Soap Silicone Mold for Essential Oil and Milk Soap
$4.93
Home Balcony Vegetable Planter - Self-Watering Plastic Pot for Strawberries and Succulents
$28.00
Pressure Swing Adsorption Nitrogen Generator - High-Purity Nitrogen Device for Heat Treatment
$36,456.00
6-Cavity 3D Rose Silicone Mold for DIY Soap Making Heat-Resistant Non-Stick Large Size for Milk Soap and Essential Oil Soap
$5.80
Traditional Handmade Baby Teething Rattle Sheepskin Wooden Clapper Newborn Toy Intangible Cultural Heritage
$29.85
Manufacturer Supply ZSJC02 Film Splicing Table, Alignment Table, Film Inspection Table
$4,484.00
Box-Type Oxygen Generator Export Equipment - Stable Nitrogen and Oxygen Production for Wastewater Treatment
$25,000.00
![[Youxin Electronics] GP2Y0E03 Infrared Distance Sensor Module 4-50cm Range](https://www.gosteppe.com/cache/medium/product/74667/legacy-main-4da8cadc5fc82afe91b124e3.webp)
![[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)
