Model 1315 builds on the features of Model 1215, with the added benefit of three channels – a dual thermal conductivity detector and a flame ionization detector (TCD/TCD/FID). Model 1315 offers a rapid in 15 minute testing solution for the determination of He, H2, O2, N2, CO2, CO, H2S, C1 through C5 and a C5/C6+ composite peak in gas, as well as liquid and pressurized liquid (LPG) samples on the FID channel. RGA Model 1315 provides critical butene-1/isobutylene separation, and also includes Model 3062 Software, which contains a merge program to combine multichannel data into one report. Also included in Model 1315 is a sample-loop purge feature that prevents contamination when changing sample types, a secondary filter and back-pressure regulation for proper liquid-sample introduction, and a built-in vaporization zone for proper liquid-sample injection. Rugged packed columns ensure no degradations from water, ammonia or other common contaminants. Meeting the requirements set forth in ASTM D1945, D1946, D2597, UOP 539-87, UOP 709, and DIN 51872-4, Model 1315 provides minimum detection levels of 0.002% for the =C5/C6+ composite and 0.001% on all other components on the FID channel, and 0.02% for H2S and 0.01% for all other components on the TCD channel.