The CO2 (Carbon Dioxide) Gas Sensor Module is designed to allow a microcontroller to determine when a preset Carbon Dioxide gas level has been reached or exceeded. Interfacing with the sensor module is done through a 4-pin SIP header and requires two I/O pins from the host microcontroller. The sensor module is mainly intended to provide a means of comparing carbon dioxide sources and being able to set an alarm limit when the source becomes excessive.
Features:
- Uses the MG811 CO2 Gas Sensor
- Easy SIP interface
- Compatible with most microcontrollers
Application Ideas:
- Sensing high carbon dioxide gas concentration
- Stand-alone / background sensing
Key Specifications:
- Power requirements: 6.5 - 15 VDC @ ~160 mA (Sense Mode) / ~2 mA (Standby)
- Interface: 1 TTL compatible input (HSW), 1 TTL compatible output (ALR)
- Dimensions: 1.5 x 1.0 x 1.0 in (38.1 x 25.4 x 25.4 mm)
- Operating temp range: +32°F to +158°F (0°C to +70°C)
Note: Parallax does not provide gas calibration data on the module and such data and alarm setting is the responsibility of the user to define. For information on user calibration please see the documentation.
Precautions:
Be aware that high concentrations of carbon dioxide can be deadly. Always be careful to perform gas tests in well-ventilated areas. This CO2 Gas Sensor Module in not designated for or approved for any application involving health or human safety. This CO2 Gas Sensor Module is for experimental purposes only; Parallax Inc absolves itself of all liability and responsibility associated with the customer’s use of this CO2 Sensor Module and is not responsible for any bodily injury, death, or property damage as a result of using this CO2 Gas Sensor Module.
Downloads & Resources:
CO2 Gas Sensor Documentation (.pdf)
CO2 Gas Sensor Schematic (.pdf)
MG811 Datasheet (.pdf)