Welcome to EnviroDIY, a community for do-it-yourself environmental science and monitoring. EnviroDIY is part of WikiWatershed, a web toolkit designed to help citizens, conservation practitioners, municipal decision-makers, researchers, educators, and students advance knowledge and stewardship of fresh water. New to EnviroDIY? Start here
Showcase

Portable soil respirometer system

Portable soil respirometer system

After having great success with the laboratory multi-chamber soil respirometer system, we built a portable version that could be deployed in the field for in-situ measurements.  It still uses the same Licor LI-840 gas analyzer system and a smaller Arduino controller, based on the Sparkfun ArduinoPro board since it has better power efficiencies than the Uno, which is important for battery-powered operation.  Data is still displayed on an LCD screen and recorded to an SD card.  The Arduino controls 3 pairs of solenoids, and a small circulation pump provides the air flow through the remote chambers and through the gas analyzer.  The entire control and measurement  system is mounted in a waterproof toolbox, and the air and power connections go through bulkheads in the case wall.  It is powered by a set of deep-cycle marine batteries mounted in a separate case.

Leave a Reply