🏭Greenhouse Gas Monitor - Real Time Data

       🔘The SpacerLabs "Greenhouse Gas Monitoring System" 🟩 was described on 28.07.2022 & 05.01.2023 🗓. Periodically since then it has been used to measure the outdoor concentrations of two potent green-house gases, Methane and Carbon Dioxide, in close proximity to "Spacerowa Laboratories" at 3m above ground level.  Methane ( CH4 ) and Carbon Dioxide ( CO2 ) concentration data in parts per million are now downloaded here every 15 minutes from the SpacerLabs Greenhouse Gas Monitor channel on ThingSpeak cloud ☁ for IoT sensor projects.

It has been noticed that increased concentration of methane coincides with wet weather conditions and vice-versa. According to NASA data, atmospheric concentration of CO2 was 416ppm in 2021, and CH4 was 1.8922ppm in 2020.

Lower left MQ-4 sensor, lower right MQ-135 sensor

The image above shows the outdoor part of the system with the two gas sensors, MQ-4 ( methane ) and MQ-135 ( carbon dioxide ), mounted in a weather-proof junction box,  ( cover removed ).

The blue trim-pot on each sensor breakout board can be used to set a concentration threshold level to trigger an alarm ⏰ and illuminate 💡 a LED ( just visible in the image ). Although active, the alarm condition is currently not being extended back to the micro-controller situated indoors for processing. 🔲