CRS Advanced Filter System (AFS) gas purifiers

CRS gas purifiers and filters

A high-capacity gas purifying system that can remove a combination of oxygen, moisture and hydrocarbons (greater than C4) from inert gases and hydrogen.

Features and benefits

  • Clean flow path (gas contacts only metal, glass and FKM seals).
  • High capacity and efficiency in a single cartridge.
  • Easy replacement with twist on/off assembly knob.
  • Double seal construction for safety.
  • Check valves protect gas lines during replacement.
  • Hardware for wall or bench mount.
  • Stainless steel fittings.

Recommended applications

GC and GC/MS carrier gas, ECD make up gas and ICP. The AFS purifiers can be expected to supply multiple installations for an extended period of time depending on the laboratory environment.

Product specifications

Advanced filter system Function Capacity Indicator color change Outlet concentration at nominal flow rate Nominal flow rate Max recommended flow rate Max pressure Dimensions Fittings
AFS I Removes water, oxygen, and hydrocarbons 850 cc oxygen, 12 g water, 8 g hydrocarbons (depending on impurities), 850 cc oxygen, Oxygen: From green to gray
Moisture: From blue to pale brown
Hydrocarbon: No indicator
Oxygen <5 ppb
Moisture <20 ppb*
Organics <5 ppb**
0.5 SLPM 2 SLPM 200 psi (13.8 bar) 30 cm x 5 cm x 5 cm 1/8" and 1/4" stainless steel fittings
AFS II Removes water and hydrocarbons 8.8 g water, 13 g hydrocarbons (depending on impurities)
AFS III Removes water 22 g water

* Water capacity based on an inlet moisture concentration of 200 ppm.
** Hydrocarbons (C5 and heavier); capacity based on 0.05% pentane inlet concentration.


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