RA-3320F Gold+ Mercury analyzer.
(from the right) RA-3F mercury measuring equipment, SC-3 automatic sampler, and RD-3 automatic reagent injector.
Reducing vaporization & gold-amalgamation mercury measuring equipment RA-3320F Gold+
(Nippon Instruments Corporation)

This instrument is used for measurement of the amount of mercury in water. It operates on the principle of reducing vaporization with/without gold-amalgamation and cold vapor atomic spectroscopy (CVAFS).