Use Thermo Scientific™ Orion™ 2100 Series and 1800 Series Analyzer Reagents for Orion Online Monitors with Orion™ process analyzers. Reagents for the Orion 2109XP, 2110XP, 2111LL, 2111XP, 2117XP, 2118XP, 2120XP, 1809, 1810, 1811AO, 1811EL, 1817HL, 1817LL, 1818 and 1820 analyzers.