Reliable, fast and easy to use: CompactGC™

If you look at gas-analysis from a laboratory point of view, you would use a traditional “GC with valve-oven” because of its reliability. If you look at it from a process-controller’s “need-for-speed” angle, a micro GC would be the preferred choice. If you look at it in a smart way: you would not compromise, but rather opt for the new CompactGC4.0!

Being a hybrid technology design, the 19″ CompactGC offers you the best from both worlds; it delivers reliable answers fast. Its draft ensures the highest level of robustness and therefore the most cost-efficient micro GC analysis available today.

pdf-logo CompactGC4.0 – Pre-Concentrator

pdf-logo CompactGC4.0 Brochure

Easy, Many Options

The CompactGC is an ‘easy to operate’ instrument. All parameters like pressure and flow settings of the carrier gas, or detector parameter settings, are controlled by convenient arranged PC software. Each analysis channel has a separate tab-page with all relevant parameters for a clear overview.

Easy column replacement
The CompactGC uses standard available capillary, wide-bore and micro-packed columns that can be replaced by the user in no-time. Finger-tight couplings are used for even more user comfort. This is a highly appreciated feature in research environments, since the needed component separation may change during the progress of the experiment.

For each channel a backflush option is available to protect the analysis column from high boiling components. In case of different sample streams or auto-calibration, a stream selection option is available. A sample pump (inside the cabinet) and stop-flow valves can be used for sample transfer and atmospheric sample injection.
For process-industry applications, 4-20 mA analogue outputs are available (in combination with EZChrom datasystem).

Several CompactGC’s can be stacked in a cabinet together with other instruments like a vacuum sampling device and a dynamic calibrator.

Rugged, Fast, Flexible

Rugged concept based upon proven technology
The CompactGC provides fast analysis in seconds at the sampling point; either by local or remote control of operation and data reduction. It accommodates up to a maximum of 4 independent analysis channels, that can be optimised separately for maximal efficiency. Since it’s construction is based upon proven GC technology, like diaphragm valves and standard available capillary columns, the CompactGC is synonymous to long-term, trouble-free operation.

Fast analysis
The use of capillary columns for gas analysis reduces the analysis time enormously. Typical analysis times are 30-120 seconds, but f.i. the separation of ethene and ethane is achieved in only 2 seconds. Conversion experiments like catalyst or fuel cell research can be monitored very frequently in this way. Due to the no-compromise design, the analysis time is equal to the cycle time; no additional flush or conditioning steps are necessary.

The modular concept of the CompactGC™ offers 4 independent analysis channels. The instrument has a very clear design, since each channel has a transparent ‘injector-column-detector’ configuration. The column ovens are heated independently, so each column has its optimal temperature.
Seven detectors for best linearity, sensitivity and selectivity are available. FID, TCD, PID, PDD, PED, PFPD and MS are covering a broad range of components and concentration levels.
All GC parameters can be changed during the analysis using the ‘run-time-table’. This means that valve switching, temperature and flow setting etc. can be changed on any wanted moment. This creates maximum flexibility: f.i. for multiple injections during one analysis run, or sample conditioning during the preceding run.
Due to the widely accepted 19″ industrial standard, the user can add the CompactGC to an existing 19″ instrument rack configuration.

Reliable, Sensitive

Reliable, rigid and cost-effective

Proven GC technology is the core of the CompactGC. With the use of diaphragm valves, solid detectors, standard available columns and highly reliable digital gases, a very rigid GC platform is obtained. There is no need to replace a complete analysis channel in case of unexpected pollution. Only the necessary parts like tubing or rotor seals will need a closer examination. The operational costs are kept very low in this way. Due to the high quality parts and state-of-the-art electronics, the analytical results are extremely accurate.

Using direct gas-injection (valve with sample loop), ppb to % concentration levels can be analysed. The system is highly inert due to the (optional) use of Sulfinert ® and Silcosteel® surface inactivation. This is particular important when polar components are analysed, f.i. in case of sulphur determination at low ppb level, using PDD or PFPD detection.
With the optional Thermal Desorption Module, the detection limit even goes down to low ppt levels. This module uses a Peltier cooled micro trap that contains a suitable adsorbent (also multi-bed adsorbents are possible). The loading of the trap is controlled by a Mass Flow Controller, so high accurate results are generated, even on this low concentration level. To maintain the fast concept of the CompactGC, the trap is loaded during the preceding analysis, and the heating of the trap (injection) takes only a couple of seconds. Please download (right column) the application note for more information.


Permanent gases

Permanent gases and light hydrocarbons

Aromatic components using build-in trap

Beer analysis

Ar, O2 and N2 in H2 (ppb level)

3 hydrocarbons in only 2 seconds (3 injections)

permanent gases (CO and CO2 on micropacked column)

Refinery gas: C6+ and C1-C5 in 200 seconds

BTEX at low ppb level, using CompactGC equipped with PID (photo ionisation detector). The sample is injected directly onto the column, without pre-concentration. In this case, a run to run time of only 60 seconds is needed. The chromatogram shows BTEX at 100 ppb level; the detection limit is around 5 ppb, depending on the component. In combination with the optional pre-concentration trap, ppt levels are analysed.

The CompactGC equiped with PID (Photo Ionisation Detector) analyses Ethylene in greenhouses down to 10 ppb.The chromatogram below shows the analysis of 42 ppb Ethylene in Fluegas in less than 30 seconds.




– 19” standard enclosure, 4HE
– 45 x 18 x 55 cm (w*h*d)
– footprint (w*d):
45*55 (landscape position)
18*55 (portrait position)
– weight: 22 kg (2 ch. Instrument)


100-240V DC, 47-63 Hz,
12A max

Heated zones:

up to 10

Electronic Gas Control

– connection: 1/8” Swagelock
– max 7 modules;
up to 14 channels
– max inlet pressure 1000kPa
– max outlet pressure
350/700 kPa
– max splitflow: 100 ml/min
– carrier gas He, Nr, Ar, (H2)
– detector gas depending on

Analysis channels:

1-4; extendable
Valve oven:
– independently heated, 40-150 °C
– up to 3 valves
– gas sampling or liquid sampling valves
– diaphragm valves with internal purge

Column ovens:

– independently heated, 40-250 °C
– up to 3




– capillary 0,32/0,25mm ID and smaller
– wide bore MXT 0.53mm ID
– micropacked 1/16” OD

Column switching

– diaphragm valve
– Deans backflush or heartcut


– inlet temperature: max. 150 °C,
– inlet pressure: max. 21 bar
(depending on used valve)
– connection: 1/8” Swagelock
– injection volume: 0.06 ul to
5ml (loop)


– 0.2% RSD or better (n=10,
Ethane, TCD detection)

Data communications

– LAN for GC parameter control and data transfer
(EZChrom/ChromQuest/OpenLab); GC editor available
– 8 * external events 24V (valve control)
– 4 * SSR output
– 24 VDC
– 3 * digital input (remote start-stop-prep)
– optional analogue output (0-1V) for detector signals

Environmental conditions

– Ambient operating temperature: 5-45 °C
– Ambient operating humidity: 5-95 %,


Analysers based on CompactGC: 

Analyser type Method Components / Options
Natural Gas Analyser ISO 6974, GPA 2261, ASTM D1945 C1-C6+, H2, He, CO2, H2S, O2, N2
RGA, Flash RGA
UOP 539, DIN 51666  C1-C6+, H2, He, CO2, H2S, O2, N2 in less than 200 seconds
CO2 emission analyser DIN 51666 Calculates CO2 emission based on RGA analysis
Fuel cell analyser

C1, CO2, N2O, C2, C3, H2O,
H2, O2, N2, CO

LPG analyser ASTM D4424 and D5303 C1-C8 brakedown

LPG liquefied injection

LPG autosampler

High purity analyser
ASTM D2504, D2505 Analyser for impurities in pure
gases down to ppb or ppt level
Permanent gas analyser
ASTM D1946,D 2504,D2505 H2, N2, O2, CH4, CO, CO2, C2
Low Sulfur analyser (PFPD) ASTM D6228, D5303, UOP791, ISO 19739 In gas and LPG, mercaptans
Light Hydrocarbon analyser ASTM D2163, D2712, D2593, D2820, D4424 and ISO 7941 C1-C10, C6+
High Throughput Analysis Ultra efficient gas analysis
unique for CompactGC due to
its extreme flexibility
THT and Acrylates in NGA Odor analysis in NGA
Air quality analyser On-line monitoring, using thermal desorption