Another option is to provide an additional pump, such as a small appendage sputter-ion pump, that can handle the small argon gas load.
This puts getter pumps within the category of capture pumps, along with cryopumps and sputter-ion pumps. Capture pumps can be taken as an analog of a garbage can.
The NEG pump, coupled to a distributed sputter-ion pump
(SIP) - mostly intended to pump residual argon and possibly methane - constitutes the principal pumping system for the UHV regime, allowing routine operation in the low 10-11 torr range.