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Add Reliable Gas Carbon Dioxide CO2 Analog Sensor Gravity Sensing to Your Next Build
Gas CO2 Analog Sensor Gravity. "Greenhouse Effect" is melting the Earth ice core every minute and creating dangerous icebergs. By knowing the exact concentration of CO2, we can do something to reduce the CO2 and to protect our Earth. For that reason, this CO2 sensor is designed by DFRobot engineer. This is the first CO2 sensor in Arduino market. The output voltage of the module falls as the concentration of the CO2 increases. The potentiometer onboard is designed to set the threshold of voltage. As long as the CO2 concentration is high enough (voltage is lower than threshold), a digital signal (ON/OFF) will be released.
It has MG-811 sensor module onboard which is highly sensitive to CO2 and less sensitive to alcohol and CO, low humidity & temperature dependency.
Important: Use the official DFRobot links below for wiring, sample code, downloads, and the latest setup notes for this SKU.
Why you'll love it
- Air Quality Control
- Ferment Process Control
- Room Temperature CO2 concentration Detection
- Operating voltage: 5V
- Interface: Gravity Analog
- One digital output
What you can build
This part fits monitoring, measurement, logging, alarms, and automation builds. It works well in Arduino, ESP32, and Raspberry Pi style projects where you need reliable real-world data from the gas carbon dioxide co2 analog sensor gravity.
Starter bundles
Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus sensor cables, headers, or a matching expansion shield for faster setup.
Recommended add-ons
Useful add-ons include displays, data logging modules, waterproof enclosures, and matching Gravity cables or sensor shields.
Technical specifications
| Product | Gas Carbon Dioxide CO2 Analog Sensor Gravity |
|---|---|
| SKU | SEN0159 |
| Brand | DFRobot |
| Interface | Analog, Digital |
| Operating voltage | 5V |
| Dimensions | 32x42mm (1.26x1.65") |
Pinout & usage notes
For analog readings, use a stable reference and keep wiring short when possible for cleaner signals. If you are using Gravity connectors, align the plug correctly and avoid forcing the cable into the wrong header.
DFRobot resources
Official product page: View on DFRobot
Wiki / documentation: Open DFRobot wiki
Schematic · Layout · MG811 datasheet
What’s in the box
1 × Gas Carbon Dioxide CO2 Analog Sensor Gravity
Frequently Asked Questions
Can I use this for logging or monitoring projects? Yes. It is a good fit for data collection, automation, and alert-based builds when paired with a supported controller.
Does it work with other boards too? Often yes, as long as voltage, interface, and pin mapping match. ESP32 and Raspberry Pi users should still check the official docs first.
Where can I find wiring and examples? Use the official DFRobot product page and wiki links below for guides, downloads, and code examples.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
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