A historical overview of Varian gas chromatographs, covering early models through the 3800 series and related data systems.
This document traces the development of Varian gas chromatographs from the first A‑90 model in the 1950s through the modern 3800 series. It details the evolution of detector technology, electronics, and column‑oven designs, highlighting key milestones such as the introduction of HyFI (Hydrogen Flame Ionization) instruments and the transition to solid‑state electronics.
The later sections describe preparative Autoprep systems, data‑handling devices, and workstation control software that enabled multi‑instrument integration. Technical specifications for many models are listed, providing insight into temperature ranges, detector options, and performance capabilities across the product line.
| TCD cell volume | 150 µl |
|---|---|
| Oven temperature range (A‑600‑HyFI) | ambient to +400 °C |
| Column oven volume (1200‑HyFI III) | 7,964 cm³ |
HyFI stands for Hydrogen Flame Ionization, the early designation used by Wilkins Instruments for their gas chromatographs.
The Varian 3800 follows the 3300, 3400, 3500, 3600, and 3700 models and inherits heritage from the earlier 1800 and 2800 models.
The A‑600‑HyFI can be equipped with flame ionization, electron capture (tritium), cross‑section, and phosphorus detectors.