Pumping module arrangement and manifold

A device for transferring precise amounts of multiple fluids from first and second sets of multiple fluid source containers into a single receiving container under laminar air flow conditions, comprising:

• a first generally rectangular pumping module;
• a second generally rectangular pumping module spaced apart from said first pumping module;
• a generally cylindrical housing attached to one of said pumping modules, said housing having a first plurality of radially extending input ports in a first plane, and a second plurality of radially extending input ports in a second plane, said housing also having a generally axially extending output port at one end thereof, said output port being generally oriented toward the back of said one module of said pumping;
• a first plurality of tubes, each one of said tubes having one end in communication with a single source container of said first set of multiple fluid source containers, and another end in fluid communication with one input port of said first plurality of radially extending ports of said housing, flow of fluid through each of said first plurality of tubes being controlled by said first generally rectangular pumping module;
• a second plurality of tubes, each one of said tubes having one end in communication with a single source container of said second set of multiple fluid source containers, and another end in fluid communication with one input port of said second plurality of radially extending ports of said housing, flow of fluid through each of said second plurality of tubes being controlled by said second generally rectangular pumping module;
• and
• said second pumping module being located above said first pumping module and spaced apart from said first pumping module by at least one-sixth the height of the first pumping module so that when laminar air is flowing from the back of said pumping modules to the front of said pumping modules, laminar air flow exists across said output port of said housing.