Patent ID: 7501277

Claim:
Chamber for treating cells contained in a suspension in the electrical field with a beaker ( 22 ) made from electrically non-conductive material, into which an elongate core ( 1 ) made from electrically non-conductive material is at least partially inserted axially through an opening ( 25 ), between the beaker ( 22 ) and the core ( 1 ) a gap ( 27 ) being present to receive the suspension; at least two electrodes ( 20 , 21 ) made from electrically conductive material arranged on the outer face of the core ( 1 ) facing the gap ( 27 ), between which an electrical field can be created to treat cells in a suspension contained in the gap ( 27 ) by applying a voltage; the thermal expansion coefficient of the material of the electrodes ( 20 , 21 ) and of the material of the core ( 1 ) being matched with one another, such that the electrodes ( 20 , 21 ) do not substantially alter their position relative to the core in the temperature range from ambient temperature up to temperatures reached during autoclaving and/or sterilising.