Here is a collection of useful links to web pages dealing with CO2 measurements in sea water and/or instrumentation.

Instruments and parts:

Titrino and reference electrode: METROHM
Coulometer: UIC
Infra-red gas analyzers: Li -cor
ROSS pH electrode: Thermo Orion
Pinch valves and isolation valves: biochem-valves

Science and literature:

Handbook of methods: DOE handbook
SOMMA manual: URI
CRM batch information: CRMs