6890 GC

Features

Full EPC on Inlet & Detectors
6890’s Electronic Pneumatics Control (EPC) digitally regulates carrier, inlet, and detector gas pressures, allowing users to select between constant pressure, constant flow, or ramped pressure/flow modes—up to three ramps—ideal for reproducible capillary chromatography.
Integrated Micro‑channel Pneumatics Manifold
A compact, low‑dead‑volume manifold houses micro‑proportional valves and high‑precision pressure/flow sensors, ensuring rapid stabilization and minimal gas path delay.
Imported High‑Precision Pressure/Flow Sensors
Built‑in sensors monitor gas conditions in real time, compensating for ambient pressure and temperature variations. Accurate to ±0.01 psi, this ensures consistent flow control and retention time stability.
Automatic Ambient Compensation
The system automatically adjusts for changes in laboratory temperature and barometric pressure, preserving method integrity without manual recalibration
Industry‑Leading Detector Design
Advanced EPC‑Controlled Detectors
Each detector features high‑precision EPC (Electronic Pneumatic Control) to regulate flow and pressure, delivering consistent gas delivery with digital accuracy—key for stable detector baseline and signal reproducibility.
Capillary & Packed Column Compatibility
Detector modules are engineered to support both capillary and packed columns, providing versatile options to suit a range of analytical methods.
Humidity‑Resistant Amplifier Board
The detector electronics employ a ceramic‑coated amplifier board, enhancing resistance to moisture and ensuring stable signal amplification and low baseline noise, even in high‑humidity environments.
Automatic Flame Ignition:
The GC’s flame detector and ignition module automatically light the flame at the detector (e.g., FID, FPD, NPD), providing consistent startup without manual intervention. It also detects flame loss and attempts an automatic relight.
Automatic Hydrogen Leak Protection (H₂ Safety Shutdown):
The GC continuously monitors gas streams for carrier and detector lines. If a hydrogen‑configured channel cannot achieve its set pressure or flow, the system interprets this as a potential hydrogen leak and initiates a safety shutdown. It automatically shuts off gas valves, opens inlet/split valves, turns off heated zones, and emits an alarm tone—preventing accidental hydrogen exposure.
Superior Oven Temperature Control
supports up to eight valve drivers (Valve 1–8), enabling advanced method flexibility. Fully electronically controlled EPC valve drivers support sequenced events during runtime (e.g., timed switching, multi-dimensional chromatography, backflush)Flexible Valve Configurations, 4-, 6-, and 10-port switching valves, Gas and liquid sampling valves, Multiposition (stream selection) valves, And remote-control or event-based valves. 
Ultra-Fine Internal Temperature Control
Oven control loop maintains within ±0.01 °C stability, and internal uniformity across the oven is kept under 1 °C, minimizing temperature gradients.
Rapid Temperature Ramping with Fast Equilibration
Supports up to 6 programmable temperature ramps with a maximum rate of 120 °C/min (on fast-heating oven models), alongside a 10-second equilibration period between ramps.
High Temperature Accuracy
Actual temperature is controlled to within ±0.3 °C of the setpoint, providing precise alignment with method parameters
Exceptional Ambient Rejection
Oven design compensates for ambient shifts, limiting drift to less than 0.01 °C per 1 °C of external temperature change.
Easy Implementation of Gas-Switching (Valve Cutting)
6890 GC allows seamless integration of multidimensional (MDGC) techniques, including heart-cutting and Deans Switch operations, using EPC-controlled valves to precisely divert sample effluent between columns or detectors.
Column Backflush Functionality
Following elution of target analytes, the system can automatically reverse carrier gas flow through the analytical column, directing residual high-boiling compounds out via the inlet or split vent. This reduces cycle time, prevents heavy residue buildup, and extends column and detector life by eliminating the need for lengthy high-temperature bake-outs
Smart Power Sharing via UPS
A 3 kW UPS (3,000 VA nominal) can simultaneously support up to 10 GC units (each ~2,250 W nominal power), ensuring uninterrupted operation and stable power during fluctuations—ideal for instrument rooms or lab clusters
Seamless Integration with Agilent GC
Fully compatible with Agilent GC systems, including the 6890N, via Agilent controllers and ChemStation (or OpenLAB). Compatible models include the 7683B and advanced 7693A Automated Liquid Sampler

Application

• Oil exploration and refining
• Petrochemicals and fine chemicals
• Food safety testing
• Environmental protection and monitoring
• High-purity gas analysis in the electronics industry
• Scientific research institutes
• Quality inspection centers
• Workplace safety
• Forensic science, and national security sectors