MQ-7 CO Carbon Monoxide Coal Gas Sensor Module

2 sold in last 8 hours
Ednex Shop
Estimated Delivery in 7 To 15 days
Dhs.7.80 AED
  • High sensitivity and fast response time

  • Output: Analog resistance

  • Simple drive circuit

  • Power heater coil with 5V

  • Add a load resistance

  • Connect output to an ADC

  • Package includes: 1 x MQ-7 CO Carbon Monoxide Coal Gas Sensor Module
Size Guide


Products and goods sold on our site are expected to meet the highest quality standards and your expectations when you order online. However, in case you decide to return your order / part of any order for any reason, please read our return policy carefully to process your returns. 

Our policy lasts 7 days. If 7 days have gone by since your order has been delivered, unfortunately we can’t offer you a refund or exchange.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.


To complete your return, we require a receipt or proof of purchase and a RMA (Return Material Authorization) Number.  Do not ship your returns till you have an RMA number.  To get an RMA Number, please call our customer support number and they will provide you with one.  Any item that is not accompanied by all the required documents above will not be accepted for returns.



To return your product, you should mail your product to:

EdNex Educational Aids Trading LLC.

205, Al Reyami Building, Karama, Near Karama PO,

PO Box 124467, Dubai,

United Arab Emirates.


You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.

Depending on where you live, the time it may take for your exchanged product to reach you, may vary.

Please use a shipping method that can be tracked and insured when you ship your returns for your own protection. We don’t guarantee that we will receive your returned item.


Refunds (if applicable)

Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.

If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.

Unopened Sets:  For unopened sets, refunds will be approved in full (minus shipping and handling) and will be credited to you in the same method payment was made.

Opened Sets: For opened sets, refunds will be in the form of store credit or exchange only.

Software:  No refund will be applicable on software purchased along with another product or stand alone.


Sale items (if applicable)

Only regular priced items may be refunded, unfortunately sale items cannot be refunded.


Late or missing refunds (if applicable)

If you haven’t received a refund yet, first check your bank account again.

Then contact your credit card company, it may take some time before your refund is officially posted.

Next contact your bank. There is often some processing time before a refund is posted.

If you’ve done all of this and you still have not received your refund yet, please contact us at


Exchanges (if applicable)

We only replace items if they are defective or damaged.  If you need to exchange it for the same item, send us an email at and after confirmation from our customer support team, please send your item to:

EdNex Educational Aids Trading LLC.

205, Al Reyami Building, Karama, Near Karama PO,

PO Box 124467, Dubai,

United Arab Emirates.

The MQ-7 CO Carbon Monoxide Coal Gas Sensor Module is a highly sensitive and responsive device designed for detecting carbon monoxide (CO) gas. It features a fast response time, allowing for quick detection and measurement of CO gas levels. The output of the MQ-7 sensor module is in the form of analog resistance, which can be easily integrated into a variety of circuits and systems. A simple drive circuit is sufficient to operate the sensor module effectively. The module requires a power supply of 5V to activate the heater coil, which plays a crucial role in the sensor's functionality. Additionally, it is recommended to connect a load resistance to the module and connect the output to an analog-to-digital converter (ADC) for data acquisition. The package includes one MQ-7 CO Carbon Monoxide Coal Gas Sensor Module, providing a convenient solution for applications requiring CO gas detection, such as in home safety systems, industrial environments, and automotive applications. It is important to follow the manufacturer's guidelines and safety precautions when using the sensor module to ensure accurate readings and reliable performance.
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MQ-7 CO Carbon Monoxide Coal Gas Sensor Module
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