Gas & liquid nitrogen generators — hydrogen, nitrogen, air
Gas generators produce clean hydrogen, nitrogen and zero air on the spot in your laboratory — from electricity, deionised water and compressed air, with no pressurised cylinders and no recurring deliveries. EnviSense supplies F-DGSi generators for chromatography and mass spectrometry — carrier gas and FID fuel, zero air, and nitrogen for LC-MS. We match the flow rate and purity class to your instruments and the number of workstations. The range is rounded out by an F-DGSi CRYOGEN liquid nitrogen (LN₂) generator that liquefies nitrogen on site — for cryopreservation, cold traps and sample cooling.
Gas & liquid nitrogen generators — hydrogen, nitrogen, air — available models
Liquid nitrogen generator
F-DGSi CRYOGEN liquid nitrogen generators produce liquid nitrogen (LN₂) on site and on demand — no tanker deliveries and no dewar storage. Gaseous nitrogen is liquefied to −196°C by the Gifford-McMahon technique, at over 99% purity (oxygen below 1%). The series delivers from 8 to 960 L/day, with a built-in dewar and touchscreen control.
- Liquid nitrogen on site and on demand — no more tanker or cylinder deliveries
- Liquefaction to −196°C by the Gifford-McMahon technique (helium cold head)
- Over 99% purity, oxygen content below 1%
- Series output from 8 to 960 L/day, built-in certified dewar
Nitrogen and air generators
F-DGSi nitrogen and zero air generators produce gas from compressed air by PSA — nitrogen for LC-MS and evaporation (up to 70 l/min, purity up to 99.99%) and clean air for FID detectors. Combined nitrogen-plus-air units are also available.
- Nitrogen and zero air from compressed air — PSA technology
- Nitrogen up to 70 l/min, purity adjustable from 99 to 99.99% (CALYPSO series)
- Zero air with hydrocarbons and CO below 0.05 ppm
- Air purity classes from zero air to ultra zero air and CO2-free
Hydrogen generators
F-DGSi COSMOS hydrogen generators produce clean hydrogen from deionised water in a PEM cell — as carrier gas or FID fuel, with no cylinders to store. Flow from 110 to 1500 ml/min and purity up to 99.99999%.
- Hydrogen from deionised water — PEM electrolysis with a titanium membrane
- Flow of 110–1500 ml/min, sized to the number of chromatographs
- Purity up to 99.99999% (O2 below 0.1 ppm) in the MF.H2 version
- Three drying classes — regenerative, membrane and cartridge