News — Sensor

The engineers here at CO2Meter have developed application notes for SenseAir’s S8 small-footprint CO2 sensor. These app notes with source code make it easy to communicate with the S8 using two of the most popular microcontrollers on the market today. Learn more about the S8 CO2 sensor. AN168: Raspberry Pi to SenseAir S8 CO2 Sensor via UART Download AN168 here. Download the source files here. the Raspberry Pi 3 is a popular credit card-sized computer used in many maker applications. The documentation and included python source code files make it easy for even first-time users to communicate with the S8...

Reading CO2 and oxygen levels in remote areas can be challenging. That's why we were excited to see CO2Meter’s S8 CO2 sensor and UV Flux oxygen sensor installed on a drone for high-altitude atmospheric testing. The project is the brainchild of RYF Technologies.  Last year, they began testing CO2 sensors to create a handheld CO2 monitor for the Chilean market. A requirement for the new monitor was that it used a built-in barometric sensor to automatically adjust the CO2 level for extreme changes in altitude in the Andes Mountains. The monitor uses a built-in micro pump to quickly change the...

If you cannot communicate between your sensor module or CO2 meter and the GasLab® Software on your computer, the problem may be caused by Windows not recognizing the correct drivers needed to create a chain from USB -> FTDI -> UART in order to communicate with the device. The drivers create a virtual COM port. If the device is plugged in before GasLab is installed, the correct drivers will not be found, even if GasLab is installed later. The solution is to uninstall the old (usually incorrect) drivers manually, install GasLab if it is not already installed, then plug your...

All infrared (NDIR) CO2 sensors have a dependence on pressure. This is because of the physics principle used to measure CO2 concentration. The NDIR type of sensor measures the IR radiation absorbed by CO2 molecules, which corresponds to the mole concentration. When pressure increases, the number of molecules in a given volume also increases linearly. Conversely, when pressure decreases (higher altitudes, for example) the number of molecules decrease. This app note includes both general information about Senseair sensors and pressure, as well as the equation for computing true CO2 level readings at various pressures useful for any NDIR CO2 sensor....