MQ-131 Ozone Gas Detection Sensor Module

2 sold in last 8 hours
Ednex Shop
Estimated Delivery in 7 To 15 days
Dhs.73.00 AED
  • MQ-131 Ozone Gas Detector Sensor Module

  • Sensitive material: O3 SnO2

  • Higher conductivity with increasing gas concentration

  • Converts conductivity change to corresponding output signal of gas concentration

  • High sensitivity to Ozone (O3)

  • Also sensitive to O3, CL2, NO2, etc.

  • Requires a simple electronic circuit for operation
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-131 Ozone Gas Detection Sensor Module is designed for detecting and measuring ozone gas (O3) concentration in the air. It utilizes a sensitive material called SnO2 (tin dioxide) to detect changes in conductivity when exposed to ozone gas. This sensor module is highly sensitive to ozone gas and can also detect other gases such as chlorine (CL2), nitrogen dioxide (NO2), and more. It converts the changes in conductivity to a corresponding output signal that represents the gas concentration. To operate the MQ-131 sensor module, a simple electronic circuit is required. This circuit allows for the proper functioning and integration of the sensor module into various applications. With its high sensitivity to ozone gas, the MQ-131 Ozone Gas Detection Sensor Module is suitable for environments where ozone monitoring is necessary, such as industrial settings, laboratories, and air quality monitoring systems. Please note that proper handling and calibration are important for accurate readings and reliable performance of the sensor module.
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MQ-131 Ozone Gas Detection Sensor Module
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