Magnetic selector and systems incorporating same

A fluid processing system comprising:

• a fluid processor connectable to a source container filled with a biological fluid, and configured to separate the biological fluid from the source container into at least two streams of material;
• a container connected to the processor along a fluid pathway,
• a magnetic selector comprising a housing configured to receive the container and a magnet carrier,
• the housing including a floor upon which the container is disposed and a door movable relative to the floor between an open state and a closed state with the container disposed in a space between a floor surface and a facing door surface being spaced a distance apart,
• the magnet carrier disposed on an opposite side of the floor from the container;
• the magnet container having at least one magnet disposed thereon and being moveable relative to the floor between a first state wherein the magnet carrier is adjacent the floor and applies a magnetic field to the container and a second state wherein the magnet carrier is spaced from the floor and disengages the magnetic field from the container;
• at least one pump configured to transfer material between the fluid processor and the container along the fluid pathway;
• and
• at least one controller coupled to the fluid processor, the magnetic selector, and the at least one pump.