Methane sensors measure the concentration of dissolved methane in the seawater. Gas molecules diffuse through the membrane to the detector chamber driven by the partial pressure gradient that exists between the chamber and the ambient water. The concentration difference between two solutions is referred to as methane concentration.
Over time, contamination of the sensor membrane from oil droplets seeping out of the seafloor can obscure and bias measurements, so it is necessary to recover and maintain methane sensors periodically.
Individual instruments of the above category, which are (or have been) connected to our observatories. Click an instrument for detailed information.
Click the instrument categories below for descriptions and lists of instruments belonging to that category.