top of page

DGA.1000 – Dissolved Gas Analyser (Chromatograph)

Download Product Specs
DGA.1000 Dissolved Gas Analyser Data Sheet
Download Product Specs

The DGA.1000 Transformer Oil Gas Chromatograph is designed for determining the content of dissolved gases in insulating oil. By a single injection, it can analyze key gases such as CO₂, CH₄, C₂H₂, C₂H₄, and C₂H₆, with a minimum acetylene detection concentration of 0.1 ppm.

Equipped with a large LCD interface and user-friendly menus, it enables accurate, efficient, and repeatable dissolved gas analysis. The system features a two-column parallel shunt system, thermal conductivity detector, dual hydrogen flame detector, and a nickel catalyst reforming furnace for reliable operation.

A PCBs model for ASTM D4059 testing is also available upon request.

Compliance Standards:

  • GB/T 17623-1998 – Gas-chromatographic determination of dissolved gas content in insulating oils

  • GB/T 7252-2001 – Guidelines for Analysis and Judgment of Dissolved Gases in Transformer Oils

  • DL/T 722-2000 – Guidelines for Analysis and Judgment of Dissolved Gases in Transformer Oils

Key Features

  • Cost-effective, multi-functional, and accurate gas chromatography system.

  • Equipped with TCD + dual FID detectors, with optional ECD, FPD, and NPD detectors.

  • Supports constant temperature and programmed temperature operation.

  • Micro-computer and integrated circuit control with data storage & transfer functions.

  • High-precision temperature control with rapid heating/cooling.

  • Pneumatic process is flexible, reliable, and expandable.

  • Up to four detectors can be installed simultaneously.

  • Multiple injection system options: packed column, glass-lined quick injection, capillary column split/spitless with diaphragm cleaning.

  • Over-temperature protection with automatic shutdown and alarm.

  • Signal outputs compatible with chromatographic data processors and workstations.

  • Carrier gas circuit protection prevents column and detector damage during TCD operation.

  • Automatic ignition function with workstation control capability.

Technical Specifications

  • Temperature Control Range: Room temperature + 4°C ~ 450°C

  • Temperature Accuracy: ±0.01°C

  • Display Accuracy: 0.1°C

  • Heating Rate: 0 – 40°C/min, adjustable in 0.1°C increments (16-step programming)

  • Programmed Temp Repeatability: ≤1%

TCD Detector

  • Sensitivity: S ≥ 3500 mV·ml/mg (benzene)

  • Baseline drift: ≤25 µV / 30 min

  • Baseline noise: ≤10 µV

  • Linear range: ≥10⁴

FID Detector

  • Detection limit: ≤3 × 10⁻¹² g/s (positive hexadecane)

  • Baseline drift: ≤1 × 10⁻¹³ A / 30 min

  • Baseline noise: ≤5 × 10⁻¹⁴ A

  • Linear range: ≥10⁴

Automation & Protection

  • 6 independent temperature-controlled channels (vaporization & capillary chambers).

  • 8-stage programmable temperature rise function.

  • Over-temperature protection with automatic shutdown.

  • Self-diagnostic function with clear fault location and alarms.

Standard Accessories

  • Main Host Unit (with nickel catalyst conversion furnace, packed column vaporization chamber, TCD, and dual FID detectors)

  • 2 × Chromatography Columns for transformer oil

  • 1 × Automatic Degassing Oscillator

  • 1 × Transformer Oil Dedicated Chromatography Workstation

  • 1 × Air Generator

  • 1 × Hydrogen Generator

  • 1 × High Purity Nitrogen Cylinder / Bottle

  • 1 × Standard Gas Bottle

  • 1 × PC and Printer

bottom of page