elecfreaksElecfreaks· Boards & embedded computing
ELECFREAKS Octopus CO2 Gas Sensor (MG811)
Manufacturer part no. EF04100
$49.90≈ 43.24 €
Price summary
Listed by elecfreaks at €43.24. Delivered to France, including shipping, VAT and any customs duty, it comes to about €69.89. Prices last checked on 2026-09-16.
Delivered cost is an estimate for a single item shipped to mainland France; the seller's checkout is authoritative.
In stock
Estimated landed cost
| Item | €43.24 |
|---|---|
| Shipping | €15.00 |
| VAT (20%) | €11.65 |
| Total delivered | €69.89 |
Estimate for a single item delivered to mainland France, shipped from outside the EU: customs duty and clearance fees may apply and are charged by the carrier.
Also available second-hand on eBay
up to 66% off new
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Imported from outside the EU — duties and VAT included in the delivered cost; customs formalities and delays are not
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Imported from outside the EU — duties and VAT included in the delivered cost; customs formalities and delays are not
Visit ↗€15.12
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New · sold by binggogo · ships from CN
Imported from outside the EU — duties and VAT included in the delivered cost; customs formalities and delays are not
Visit ↗€15.68
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MG811 CO2 Carbon Dioxide Gas Sensor Module Detector with Analog Signal Output
New · sold by image006-04 · ships from CN
Imported from outside the EU — duties and VAT included in the delivered cost; customs formalities and delays are not
Visit ↗€15.53
billed $17.92
€22.97 delivered
Third-party listings on eBay, matched to this product by its part number or title. Robotitem neither sells nor warrants these items: condition, stock and lead times are the seller's, and a listing disappears once sold. Delivered cost includes the seller's actual shipping.
Specifications (automatically extracted)
Mechanical
| Weight | 16 g |
Description
Octopus MG811 CO2 Gas Sensor is a CO2 electronic brick in our OCTOPUS series, the basic design for the outlook, PCB fixing holes and connections are the same as theirs. The higher the CO2 concentration is, the lower the output voltage would be. The users can read the CO2 value easily after checking our brochures and coding samples. The CO2 probe is made with an industrial grade that is highly allergic to CO2 and anti-interference to alcohol and CO. It is of high performance and quick response with a loaded signal amplification circuit even in different temperature and humidity environments. Besides, the heating circuit on-board helps to convert to stable 6V voltage from 5V directly improves the adaptability of the module. Caution The module belongs to electrochemistry CO2 and the probe heats itself when working, please do not touch in case getting hurt. Please make seal preservation while the sensor is not in use in case the probe gets “poisoned” due to the long time exposure in the air or you have to heat it continuously for another 48 hours to activate it! The MG-811 probe belongs to the category of electrochemistry sensor, please make a proving operation for it before using it to get an accurate value. Characteristic Working voltage of the probes: 6v With the booster circuit inbuilt, it supports input DC 3.7~5V and the current over 500mA. OCTOPUS electronic bricks. Easy connection. Specifications Item Parameter Name Octopus MG811 CO2 Gas Sensor SKU EF04100 Working Voltage DC 3.7~5v Connection Mode G-GND，V-VCC，S-pin signals Size 31 x 48mm Net Weight 9.6g Outlook & Dimension Hardware Connection The module connects to the A0 of the Arduino UNO through a Dupont wire with the best fastener, the Arduino main board much be powered with an extra connection(7.5V-9V). PROVING OPERATION The MG-811 probe belongs to the category of electrochemistry sensor, please make a proving operation for it before using it to get an accurate value. The probes heat themselves after giving
