> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# 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.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SEN0159:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
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- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## 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)