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MQ-7 Carbon Monoxide CO Gas Sensor Detection Module For Arduino

80 % of buyers enjoyed this product!
In stock
Sale Price: US $1.24
45 days Money back
45 days Money back Returns accepted if product not as described, buyer pays return shipping; or keep the product & agree refund with seller.
On-time Delivery
On-time Delivery
Guarantees: On-time Delivery 60 days


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* Item Description

MQ-7 Carbon Monoxide CO Gas Sensor Detection Module For Arduino

Sensor batch is different, the color may be different

technical parameter

1, heating voltage: 5 + 0.2V (AC, DC)

2, working current: 140mA

3, loop voltage: 10V (max 15V DC)

4, load resistance: 10K (adjustable)

5, the detection concentration range: 10-1000ppm

6, clean air voltage: less than 1.5V

7, sensitivity: 3%

8, the response time: less than 1S (pre 3-5 minutes)

9, recovery time: less than 30S

10, power consumption: less than 0.7W

11, working temperature: -10~50 (nominal temperature 20)

12, working humidity: 95%RH (nominal humidity 65%RH)

13, service life: 5 years

14, size: 35mm * 22mm * 18mm

production characteristics

1, with the signal output indicator;

2, dual signal output (analog output and high and low level signal output);

3, high and low level signal output signal is low, can be directly connected to the mcu;

4, analog output 0~5V voltage, the higher the concentration, the higher the voltage;

5, the carbon monoxide gas with high sensitivity and good selectivity;

6, has a long life and reliable stability;

7, fast response recovery characteristics;

For more quantity, Please contact us


  1. Orders will be shipped within 1-2 business days after the payment verification.
  2. SERVICE TRANSIT TIME is provided by the carrier and excludes weekends and holidays.Transit times may vary,particularly during the holiday season.
  3. Items will be marked as ” Gift ” in low value.
  4. Delivery time (Business days): Pls provide P.O. Boxes or Zip Codes Address.
    Country Approx. Delivery time

    Hong Kong Post Air-Mail

    United States, United Kingdom, Australia 7-14 working days
    Canada, Western Europe, Northern Europe, Central Europe 7-21 working days
    Other Country 15-30 working days
    UPS or DHL North America, Australia, Western Europe, Northern Europe, Central Europe 3-7 working days
    Other Country 5-10 working days


  1. You have 7 days to contact us and 30 days to return it from the date it was received.
  2. If you have not received your shipment within 30 days from payment,please contact us.We will track the shipment and get back to you as soon as possible with a reply.Our goal is customer satisfaction!
  3. Both Replacement and Money Return are accept. Return shipping fee afford with buyer.


  1. 12 months Manufacturer’s limited warranty for defective items(excluding Man-made damage).Accessories come with a 3-month warranty.
  2. Defective item MUST BE reported and returned within the warranty period.


  1. We maintain high standards of excellence and strive for 100% customer satisfaction. Feedback is very important,We hope you can contact us immediately before you give us neutral or negative feedback.
  2. If you have any questions, our Customer Service staffs welcome you to email or call us. We strive to answer all questions and resolve any problems as quickly as possible

–wish you have a happy shopping , welcome to the next visit–

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Name Rating Feedback
Shipping Company Shipping Cost Estimated Delivery Time
DHL 3 - 7 days
UPS Expedited 3 - 7 days
EMS 5 - 14 days
Post Air Mail Free Shipping 15 - 45 days
Return Policy If the product you receive is not as described or low quality, the seller promises that you may return it before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe) and receive a full refund. The return shipping fee will be paid by you. Or, you can choose to keep the product and agree the refund amount directly with the seller.

N.B.: If the seller provides the "Longer Protection" service on this product, you may ask for refund up to 15 days after order completion.
Seller Service On-time DeliveryIf you do not receive your purchase within 60 days, you can ask for a full refund before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe).

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Price:  US $1.24 / piece