Hospital Equipment Mfg. Co. Offers Clay-Adams Type Blood Cell Counters. Hospital Equipment Mfg. Co. Has received ISO 9001:2000 certifications. Clay-Adams Type Blood Cell Counters is a convenient table model that can be operated with either hand having 8 keys and 1 totalizer unit, for use with a microscope to count the meta-myelocytes, basophil, monocytes, lymphocytes, polycytes and a window for other miscellaneous cells. Clay-Adams Type Blood Cell Counters has been equipped with key which can record up to 999 with the exception of the totalizer unit which records the total number of strokes made on all the other keys. A reset knob at either end of the counter can turn all the keys to zero.