This unit can provide both hydrogen gas and zero grade air to FID detectors on Gas Chromatographs.

Hydrogen gas is produced from deionised water using a Proton Exchange Membrane Technology. Zero air is produced by purifying compressed air sourced from the air network to a total hydrocarbon concentration of < 0.05 ppm (measured as methane). The RACK.FID.H2 generator combines the hydrogen serie ND-H2 and Zero air serie ZA generators in one unit.

The touch screen LCD interface provides simple and user friendly management of all functions on the unit.

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Improved chromatograph result
The reduction of hydrocarbons on zero air part, including, methane to < 0.05 ppm
decreases the background noise level and gives the baseline much better stability,
considerably increasing detector sensitivity and ensuring precise analytical results.
The use of hydrogen as a carrier gas allows lower temperature elution, thus extending the life of the chromatograph column.
Hydrogen as a carrier gas is faster and more sensitive than the more-expensive helium. Run time savings of 25% to 35% without a decline in resolution.

Increased laboratory efficiency
A constant, uninterrupted gas supply of guaranteed purity eliminates interruptions of analyses to change cylinders and reduces the amount of instrument re-calibrations required.

Save money
The unit only requires connection to a suitable socket and to external source of compressed air for the zero air part. The investment can be paid back in less than one year

Improved safety
The very limited internal volume (less than 50 ml for H2) allows safe use of the gas generators where the use of cylinders is risky or prohibited. The application of tested safety technologies stops the unit in the event of leaks or malfunctions.

Simple installation
Gas generators can be installed in the laboratory, on or under a bench, eliminating the need for long gas lines from cylinders secured elsewhere.


ZA part need to be connected to an
external clean and dry compressed
air source
H2 / Zero Air flow rate – cc/min100 / 1800
160 / 1800
250 / 1800
250 / 5000
300 / 5000
500 / 5000
600 / 5000
1000 / 5000
H2 / Zero Air purity> 99.99999% (O2 < 0.1 ppm, dewpoint H2O < -75°C (-103°F)) CH4 < 0.05 ppm
H2 delivery pressure11 bar max (160 psi)
Air inlet pressure (min/max)
Air inlet quality required
Min. 4 bar (58 psi) – Max. 10 bar (145 psi)

Max. inlet hydrocarbon content < 100 ppm; water dewpoint < -20°C (-4°F)

Air delivery pressure0.5 bar (8 psi) less than inlet air pressure
Internal water tank for H2300 ml with electronic level control
Water quality / supply pressure
Deionised, ASTM II, < 0.1 μS / -0.2 bar (3 psi) / 1 bar (14 psi)
Temperature / HumidityFrom 5°C to 35°C (41 – 95°F) / 80% at 25°C (77°F)
LCD digital screenDigital screen (operating parameters, system status, alarms) with LED indicators (Power on/off; ready or errors)
Dimensions (W x H x D)Standard 19" RACK 3U – Depth 54 cm
Outlet ports H2 / Zero Air1/8 Swagelock
Inlet port for Zero air1/4 NPT
Weight (kg/lbs)From 20 to 22 kg / 44 to 48.5 lbs depends of model
Power supply voltage110 – 120 V 60 Hz / 220 – 240 V 50 Hz
CommunicationRS232/RS485 (Option) – USB/PC control monitoring (In series)
Option : Software functionCascading mode
Noise / IP rating< 25 dB(A) / IP20
CertificationCE, CSA, FCC




KRSS Left Strip