6kDa Cut-off

AT 4 & AT 9 Series are well suited for recovering low molecular weight neurotransmitters in small CNS regions and ideal for work in rodents such as rats or larger. The AT 9 membrane OD being about 0,6 mm means a great deal bigger membrane area in contact with the tissue which increases recovery levels, compared to AT 4 and 0,2 mm OD. Tissue damage will be larger with increased membrane OD.  AT 10 Series have identical membrane as AT 4 but with significantly smaller probe and guide head making less of an imprint on top of the skull, this is a clear advantage when working with mice or small rats.