The Combination E.S.P. has two collection grids and uses an electrode like the Point-to-Plane model.  It uses the same standard transmission electron microscope grid as one collection surface and a 3/8” carbon planchet as the second collection surface for scanning electron microscopy.  By symmetrically placing the electrode and collection surfaces, the single needle electrode charges particles to both collection surfaces.  The recommended current charge and flow rate is the same, 3 microamperes and 100cc/min., as with the Point-to-Plane.        

Stock # 02-911  Combination E.S.P.