Analog CO₂ sensor (MG811) for Microbit – Elecfreaks Octopus

Elecfreaks Octopus – CO₂ Gas Sensor (MG811) Analog for Microbit Industrial-grade electrochemical sensor for measuring carbon dioxide concentration in the air. Produces an analog voltage output, where as the CO₂ concentration increases, the output voltage decreases. Compatible with Micro:bit and Octopus:bit projects, including an internal heating element designed to stabilize the reading.

Key Features
Precise and High-Performance CO₂ Sensor
The sensor is compact by nature of being electrochemical, highly sensitive to CO₂ and ignoring interference from alcohol and CO gas. It exhibits fast and accurate responsiveness even under varying temperature and humidity conditions.

Integrated control and heating circuit
Includes a booster circuit that converts an input voltage of 3.7–5V to a stable voltage of 6V for normalization and reading stability.

Plug-and-Play interface
Supports simple connection via 3-pin (GND / VCC / Signal) to platforms such as Micro:bit or Octopus:bit.

**Main Technical Parameters**
● Operating Voltage: DC 3.7V–5V (Current ≥500mA)
● Dimensions: 48 × 31 mm, net weight approx. 9.6g.

Pre-use Instructions and Safety Suggestions
The sensor heats up during operation – avoid direct contact. It is recommended to store it in a sealed container when not in use, and complete reheating for up to 48 hours if exposed to air for a long time.