# CO2 Sensor (Arduino compatible)

**Type:** Product page · **SKU:** SEN0159 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/co2-sensor-arduino-compatible.html ([markdown](https://core-electronics.com.au/co2-sensor-arduino-compatible.html.md))

"Greenhouse Effect" is melting the Earth ice core every minute and creating dangerous icebergs. By knowing the exact concentration of CO2, we can do somehing 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.

## Pricing

- **Price:** $85.05 (inc GST) — $77.32 AUD, exc GST
- **Quantity discounts:** 6+ $73.45 (exc GST) · 12+ $70.36 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Sep 03 and Sep 07.

## Description

This is the first CO2 sensor specifically for the Arduino. The output voltage of the module falls as the concentration of the CO2 increases. The onboard potentiometer 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 a MG-811 sensor module onboard which is highly sensitive to CO2 and less sensitive to alcohol and CO, low humidity & temperature dependency. All components have industrial quality for stability and reproducibility.
- Onboard heating circuit regulates the temperature for sensor to function in its optimal range.
- This sensor has an onboard amplifier to strengthen its output signal.
 
## Specifications

- Operating voltage:5V
- Interface: Analog
- Range: 0～10000 ppm
- One digital output
- High quality connector
- Immersion gold surface
- Onboard heating circuit
- Size:32x42mm
 
## Documents

- Wiki Doc
- [Schematic](https://core-electronics.com.au/attachments/localcontent/CO2%20Sensor%20V1%20SCH_152593b0885.pdf)
- [Layout](https://core-electronics.com.au/attachments/localcontent/CO2%20Sensor%20V1%20Layout_10657faecc4.pdf)
- [MG811 datasheet ](https://core-electronics.com.au/attachments/localcontent/CO2b%20MG811%20datasheet_982254d9ce7.pdf)
- [Sample code for Arduino](https://core-electronics.com.au/attachments/localcontent/MG811%20Sample%20code_1859bbcd6c.zip)
 
## Parts List

- 1 x CO2 Sensor

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/s/e/sen0159-1.jpg)