An electrical resistance counter of the Coulter type has been designed to count particles intended for animal injections and to dispense them into a package (a length of polyethylene medical tubing). The packaged particles are used for injections at a later date. In a typical application, two thousand 10 &mgr; spheres can be counted and loaded into a 61 cm length of PE‐50 tubing (total volume 0.25 ml) in about 5 sec. The accuracy of the count has been determined by an independent method.