MQ-9 Carbon Monoxide, Methane and LPG Gas Sensor Module
Introducing the MQ-9 Carbon Monoxide, Methane, and LPG Gas Sensor Module, an essential tool for detecting harmful gases in a variety of environments. This module uses SnO2 as its sensitive material, enabling accurate detection even in clean air.
It operates through a temperature cycling method, detecting carbon monoxide at lower temperatures (heated to 1.5V), where its conductivity increases with gas concentration. At higher temperatures (heated to 5.0V), it effectively identifies combustible gases like methane and propane while clearing away other adsorbed gases.
Prioritize safety and gain peace of mind with the MQ-9 Gas Sensor Module, ideal for applications ranging from home safety systems to industrial and environmental monitoring.
Wire Connections
VCC – Positive pole (5V) GND – Negative pole DO – TTL switch signal output AO – Analog signal output
Features
Good sensitivity to CO/Combustible Gas
High sensitivity to Methane, Propane, and CO
Long life and low cost
Simple drive circuit
Applications
A device that detects gas leaks in the home
A device that monitors gas levels in industrial settings
A device that can be carried around to detect gas hazards
Specification
Item Type:
Gas Sensor
Operating Voltage (V):
5
Model Name
MQ-9
Current Consumption (mA):
150
Additional Specs.:
Ao output: 0.1-0.3V (relatively clean), Do output: TTL digital 0 and 1 (0.1 and 5V)
Length (mm):
32
Width (mm):
20
Height (mm):
16
Weight (g):
5
Shipping Weight
0.01 kg
Package Includes
1 x MQ9 Carbon Monoxide, Methane, and LPG Gas Sensor Module
The MQ-9 Carbon Monoxide, Methane and LPG Gas Sensor Module is a versatile gas and dust sensor used across a wide range of applications including air quality monitoring, gas leak detection, industrial safety, HVAC systems, and environmental monitoring.
Common use cases:
Building a gas leak alarm for LPG/methane
Monitoring indoor air quality (CO2, VOC)
Dust monitoring in a workshop
This product is ideal for environmental engineers, safety professionals, and IoT developers.
Technical Tip: MQ-series sensors need a warm-up period (24-48 hours for first use). Calibrate in clean air for accurate readings.
Shipping & Delivery
Free shipping on orders above ₹999 across India
Dispatched within 1-3 business days
Expected delivery: 3-7 business days depending on location
Secure packaging to ensure safe transit of electronic components
Weight
0.01 kg
Dimensions
3 × 3 × 2 cm
15 Days Warranty
Please note that this item is only covered by a standard supplier warranty against manufacturing defects for a period of 15days from the time of delivery. It is important to understand that only manufacturing defects are covered under this warranty, and any other issues will not be considered for reimbursement or replacement. We strongly advise inspecting the product upon delivery to ensure it meets your expectations. In case of any manufacturing defects, we guarantee reimbursement or replacement.
What voids warranty:
If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.
Mahesh Deshpande (verified owner) –
Superb MQ-9 Carbon Monoxide, Methane and LPG! Using it in my environmental monitoring system. Very reliable data.
Rajesh Iyer (verified owner) –
Excellent MQ-9 Carbon Monoxide, Methane and LPG! Readings are accurate and consistent. Perfect for my project.
Shreyas Das –
Great quality MQ-9 Carbon Monoxide, Methane and LPG. Calibrated it easily and the accuracy is impressive.
Kapil Gupta –
Excellent sensitivity and range on this MQ-9 Carbon Monoxide, Methane and LPG. Works better than I expected.
Jayesh Trivedi (verified owner) –
Pretty good MQ-9 Carbon Monoxide, Methane and LPG. Documentation could be better but the sensor itself is solid.
Raj Parekh (verified owner) –
Nice MQ-9 Carbon Monoxide, Methane and LPG. Readings are mostly accurate. Good enough for my hobby project.
Yashwant Trivedi (verified owner) –
This MQ-9 Carbon Monoxide, Methane and LPG is excellent for the price. My data logging project is working perfectly now.
Isha Chatterjee (verified owner) –
This MQ-9 Carbon Monoxide, Methane and LPG works great with Arduino. Easy to wire up and code.
Tarun Sharma (verified owner) –
This MQ-9 Carbon Monoxide, Methane and LPG works great with Arduino. Easy to wire up and code.
Lakshmi Dhawan (verified owner) –
Outstanding accuracy from this MQ-9 Carbon Monoxide, Methane and LPG. Compared with a professional instrument, readings match closely.
Gaurav Tandon (verified owner) –
Perfect for my weather station. This MQ-9 Carbon Monoxide, Methane and LPG gives consistent readings day and night.