The Hydrothermal Vent Fluid Resistivity and Temperature probe (TRHPHA301) was placed at the base of the vent called 'Escargot' in 2014. Photo credit: NSF-OOI/UW/CSSF; Dive R1729; V14.
Shown here is a temperature-resistivity probe attached to a data logger and left in place at a hydrothermal vent in Endeavour Field on the Juan de Fuca Ridge. This type of probe is now being adapted for installation on cabled ocean observatories.