MG-811 CO2 Gas Sensor With I2C Interface

The MG-811 CO2 Gas Sensor makes it easy to monitor carbon dioxide gas concentration levels using our I2C Mini Module form factor. The MG-811 is connected to an on board signal condition amplifier and the signal amplifier is connected to an ADC121C 12-Bit Analog to Digital converter, which is capable expanding to 9 gas sensors per I2C port using just two address jumpers (making full use of the floating address system). This MG-811 CO2 Gas Sensor is less Sensitive to Carbon monoxide(CO) and Alcohol.

This MG-811 CO2 Gas sensor board has dual on board power supply. It has one dedicated 6V power supply for the Gas sensor element and one 5V power supply for Analog interface chip.

The MG-811 is capable of sensing carbon dioxide air concentration levels between 350 and 10,000ppm. The ideal sensing condition for the MG-811 CO2 Gas Sensor is 25°C ±2°C at 65% ±5% humidity. An internal preheater inside the sensor helps achieve the ideal sensing conditions, but the datasheet recommends over 48 hours for preheating to achieve optimal accuracy. Because of the internal preheater, this sensor requires more current than most of our I2C Mini Modules. We measured 139ma for this I2C Mini Module so we strongly recommend planning a power strategy for your I2C master device to deliver no-less than 150ma per sensor! This sensor comes pre-calibrated to the datasheet’s recommended values; however, final calibration may be required for accurate measurements, as we do not stock the equipment for full-scale calibration of these sensors.

All I2C Mini Modules are designed to operate at 5VDC. Using a convenient 4-Pin plug, devices can be daisy chained onto the I2C Bus, eliminating the need for soldering. Simply plug together the devices you need for your next automation application. Pull-up resistors are included with all NCD master devices. If you are wiring in your own I2C port, on-board 4.7K jumper-selectable pull-up resistors are available for convenience purposes.