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Item #:
17535585
1 Pack MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135 Gas Sensor Module Starter Kit
90% of respondents would recommend this to a friend
Item #:
17535585
BHD 14
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MQ-4 gas sensor for high sensitivity.
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What Stands Out
Comprehensive Sensor Set
Includes nine diverse sensors, enabling users to explore various gas detection applications efficiently. This starter kit is perfect for beginners and enthusiasts seeking to learn about gas sensing technology.
User-Friendly Design
The kit is organized with clear labeling and connections, ensuring easy assembly and use. It is ideal for educational purposes, allowing users to quickly grasp concepts of gas detection.
Versatile Applications
Designed for a range of applications from air quality monitoring to environmental science projects. This flexibility makes it suitable for both DIY projects and educational settings, providing exceptional value.
Product Details
| Alarm | Audible |
| Operating Humidity | 95 percent |
| Product Style | simple |
| Brand | HUABAN |
| Model Number | MQ2 MQ3 MQ4 MQ5 MQ6 MQ7 MQ8 MQ9 MQ135 |
| Unit Count | 1 Count |
| Number of Items | 9 |
| Manufacturer | HUABAN |
| Mfr Part Number | MW-Sensor-Gas-Kit-9PCS |
| Style | simple |
| Item Weight | 1 lbs (450 grams) |
Who Should Buy?
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Hobbyist Enthusiasts
Ideal for electronics enthusiasts looking to experiment with various gas sensors for creative projects.
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Educational Purposes
Great for students and educators to explore concepts of gas sensing and environmental monitoring in a hands-on approach.
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Prototyping Developments
Suitable for developers needing quick prototyping capabilities with diverse gas detection configurations in IoT applications.
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Professional Installations
Not suited for critical applications requiring robust and calibrated industrial-grade gas sensors due to precision needs.
Product Description
1 Pack MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135 Gas Sensor Module Starter Kit
Have any Query? Chat with us
Customer Questions & Answers
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Question:
What is the MQ-4 Gas Sensor used for?
Answer: The MQ-4 Gas Sensor is designed to detect specific gases, particularly methane and LPG. It functions by measuring the concentration of these gases in the air, making it ideal for applications related to safety in homes, commercial kitchens, and gas leak detection systems. When the sensor detects a concentration above a certain threshold, it can trigger alarms or safety mechanisms, ensuring a quick response to potential gas leaks. -
Question:
How does the MQ-4 Gas Sensor work?
Answer: The MQ-4 Gas Sensor operates through a heating element that raises the temperature of the sensing material to a high level. When the target gases are present, they interact with the sensor material, changing its resistance. This change is measured and converted into an electrical signal, which corresponds to the gas concentration level. Understanding this working principle is crucial for integrating the sensor into various projects, such as smart home systems or industrial monitoring setups. -
Question:
Is the MQ-4 Gas Sensor safe to use indoors?
Answer: Yes, the MQ-4 Gas Sensor is safe for indoor use when installed correctly. It helps in monitoring indoor air quality and can detect harmful gas levels, providing essential safety measures. By placing the sensor in areas like kitchens or utility rooms, it can effectively alert occupants to gas leaks, allowing for timely action to prevent hazardous situations. -
Question:
What microcontrollers are compatible with the MQ-4 Gas Sensor?
Answer: The MQ-4 Gas Sensor is compatible with various microcontrollers, including Arduino, Raspberry Pi, and ESP8266. This compatibility makes it a versatile choice for DIY projects and IoT applications. By connecting the sensor to these microcontrollers, users can build their own gas detection systems and integrate them with other electronic components, enhancing functionality and user experience. -
Question:
What is the response time of the MQ-4 Gas Sensor?
Answer: The MQ-4 Gas Sensor typically has a response time of about 10 seconds. This means that it can quickly detect gas concentrations and provide timely alerts. The rapid response is crucial in emergency situations, helping to enhance safety measures in homes and businesses where gas leaks might occur, ensuring individuals have enough time to react. -
Question:
Can the MQ-4 Gas Sensor be used in outdoor applications?
Answer: While the MQ-4 Gas Sensor is primarily designed for indoor use, it can be adapted for outdoor applications with appropriate housing to protect it from environmental factors like rain and dust. This versatility allows users to monitor gas leaks in diverse settings, such as outdoor cooking areas or industrial sites, ensuring comprehensive safety compliance wherever gases are present. -
Question:
What are the power requirements for the MQ-4 Gas Sensor?
Answer: The MQ-4 Gas Sensor operates on a voltage range of 5V to 12V, making it convenient for various electronic applications. This broad voltage range allows for flexibility when integrating into different projects, whether it's for low-power microcontrollers or more robust systems. Understanding power requirements is essential for effective project planning and ensuring optimal performance. -
Question:
How do you calibrate the MQ-4 Gas Sensor?
Answer: Calibrating the MQ-4 Gas Sensor involves exposing it to known concentrations of methane or LPG in a controlled environment. This process helps to establish a baseline for accurate readings. Calibration is critical for ensuring the sensor provides reliable data over time, especially when used in safety-critical applications where precise gas levels must be monitored consistently. -
Question:
What are the common applications of the MQ-4 Gas Sensor?
Answer: Common applications for the MQ-4 Gas Sensor include gas leak detection in residential and commercial kitchens, monitoring of gas levels in industrial settings, and integrating into smart home systems for enhanced safety. These uses demonstrate its versatility and importance in maintaining a safe environment where natural gas is used for heating and cooking. -
Question:
Where can I buy 2 Pack MQ-4 Gas Sensor in Bahrain?
Answer: You can purchase the 2 Pack MQ-4 Gas Sensor at Ubuy. Ubuy offers a wide range of electronic components and safety equipment, making it convenient for all your gas detection needs. With a user-friendly platform and reliable customer service, Ubuy is an excellent choice for acquiring quality sensors for your projects.
HUABAN Gas Detectors & Alarms MQ2 MQ3 MQ4 MQ5 MQ6 MQ7 MQ8 MQ9 MQ135 Editorial Review
This review provides an in-depth analysis of the MQ-138 gas sensor module, which is suitable for tracking changes in VOC levels in real-time, detecting their presence or setting an alarm at a certain gas threshold. In particular, the module is sensitive to acetone fumes, but it does not provide precision readings for PPM. While the MQ-138 is not super accurate, it is very reactive to gases and provides useful data. It has a preheat time of 48 hours but does not necessarily need to be heated for hours on end every time it is powered on. It is a variable resistor and has humidity and temperature influences, but the resistance of the sensor component stabilizes after 24 hours. The MQ-138 works as a stand-alone module, emitting an LED signal for specific concentration levels but needs an analog pin (AOUT) for approximations of the actual gas level, which can be achieved by using an Adruino or MCP3008. The pinout on the sensor component is also discussed. Finally, a drawback of this module is the long warm-up time, several hours, and its relative inaccuracy for ppm readings.
Customer Reviews & Ratings
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Pros
- Reactive to different gas types
- Useful for tracking changes in real-time
- Works as a stand-alone module with LED signal
- Detects the presence of gas
- Provides useful data
Cons
- Not super accurate
Platform Trust & Buyer Confidence
MB
Maryam
Verified buyer
“The order arrived fast and in perfect condition”
2 June 2026 · via Trustpilot
T
trusttaker
Verified buyer
“I loved it. That was my second order, and I am already thinking of placing a third order.”
16-Jul-26 · via Trustpilot
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Haitham
Verified buyer
“Trusted merchant”
11 July 2026 · via Trustpilot
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Mohammad
Verified buyer
“Excellent quality and very fast delivery, I really appreciate your service, when you work good I will appreciate that, I am very satisfied , thank you”
13 June 2026 · via Trustpilot
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Lulwa
Verified buyer
“I like the package arrived safely”
17 June 2026 · via Trustpilot
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BHD 14
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Features & Benefits
- Highly sensitive MQ-4 gas sensor for accurate gas detection.
- Operates at a low input voltage of DC5V.
- Consumes only 150mA of power, ensuring energy efficiency.
- Provides both digital (TTL) and analog output signals.
- Easy integration with simple circuits for effective monitoring.
- Includes 2PCS MQ-4 Sensor Module for greater value.
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