Transformer Oil Dissolved Gases Analysis by Gas Chromatograph

This gas chromatograph is used for dissolved gas analysis of transformer oil by gas chromatography method, full automatic operation and high accuracy.

  • Model: 3420A


  • Self-diagnostic function:

1) Core tests;

 2) Automatic tests; 

3) Extended tests; 

4) Basic tests;

Monitor the status of GC continuously.  Once finding faults, it’ll display the information and show the wrong zone and the settling method.

  • Self-protective function:

1) Overrun temperature protection; 

2) Short circuit hint; 

3) TCD filament protection;

 4) FID flameout hint; 

5) PFD exposed-light protection;

6) Keyboard locking with password; etc., ensuring normal running.

  • Simple operation, powerful automation:

1) All parameters can be entered through keyboard with prompt function;

2) 4 sets of complete chromatography analysis methods can be stored and recalled automatically;

3) An autosampler can be connected;

4) Parameters can be modified instantly while the GC is running;

5) Chromatography analysis method can be activated for 99 times repeatedly at the same time. It’s especially suitable for unattended operation.

  • More choices of injectors:

1) On- Column Injector for Packed Column; 

2) Flash Vaporization Injector for Packed Column

3) Automatic or manual gas inject valve;

 4) Headspace sampler;

5) Thermal desorption system

6) Split/Splitless Capillary Injector; Three Injectors or two Split/Splitless Capillary Injectors can be fixed on GC.

  • More choices of detectors:

1) TCD; 2) FID; 3) ECD; 4) FPD; 5) TSD

Maximum of two TCDs or three different kinds of detectors can be installed.

  • Reactor: 1) Internal; 2) external

  • Time programming of detectors:

Each of detectors has 5-ramp programmable time control.  Output-signal, attenuation range, and polarity can be set automatically.

  • Time programming of external events:

Providing 4 external events with 20-ramp programmable time control.  The optional GC relays may be used to automate valves, operate split/splitless capillary injectors, drive auxiliary devices, or switch signals between detector A and detector B in a run.

  • Many kind of special-purpose GC can be provided according to user’s request. 

Kolery Analysis Instruments


  • Column oven:

Operating temperature range: ambient temperature to 400℃;

Dual opening-door at the back of column oven;

Cooling time: 250℃ to 50℃ in 5 min;

Programmable oven with 4-ramp temperature control;

Temperature programming rate: 0.1~50℃/min

  • Injector system:

Operating temperature range: ambient temperature to 400℃

  • Thermal conductivity detector -TCD:

Maximum temperature: 400℃

Sensitivity: ≥10000mv • mL/mg (for butane)

Linear range: 105

Current range: 50 to 400mA

  • Filament protection:

If He or H2 carrier gas flow in the detector cell is cut off for 4 minutes, filament power will be shut off automatically.

  • Flame ionization detector-FID:

Maximum temperature: 400℃

Minimum detectivity: ≤5×10-12g/s (n-C16)

Linear range: 107

Flameout hint: monitoring the status of GC continuously after being turned on.

  • Electron capture detector-ECD:

Maximum temperature: 400℃

Minimum detectivity: ≤0.1pg/mL (γ-666)

Linear range: 104

Emission source: 11mC63Ni

  • Flame photometric detector-FPD:

Maximum temperature: 400℃

Minimum detectivity:

[P] ≤2×10-12g/s (tributyl phosphate)

[S] ≤2×10-10g/s (p-methylsulfurphosoharous)

Linear range: [P]:105 [S]: 103

Two air-hydrogen flames:For large volume injection or trace sample injection analyses;

Single air-hydrogen flame: sulfur sensitivity can be increased;

Direct output: for phosphorus or sulfur analyses;

Square-root output: for sulfur analyses;

Exposed-light protection:

When exposed-light current is more than 12μA, high voltage will be cut off automatically.

  • Nitrogen-phosphorus detector-TSD:

Maximum temperature: 400℃

Minimum detectivity:

[N] ≤2×10-13g/s (azobenzene)

[P] ≤1×10-13g/s (malathion)

Linear range: [N]:105 [P]: 104