deep sea sensors

methane

Laser methane sensor or METS methane sensor

oxygen

Shallow water (<1200m) and deep sea (6000m) dissolved oxygen sensors

carbon dioxide

Measure dissolved carbon dioxide to depths of 4000m

conductivity

Measure electrical conductivity (EC) and salinity to depths of 6000m

pH

Shallow water (<1200m) and deep sea (6000m) pH sensors

redox

Shallow water (<1200m) and deep sea (6000m) redox sensors

deep sea lander

Biogeochemical profiles of marine sediments at 6000m depths