The EasyLyte Na/K, EasyLyte PLUS Na/K/Cl, EasyLyte Lithium Na/K/Li, EasyLyte Na/K/Cl/Li and EasyLyte Calcium Na/K/Ca/pH analyzers are completely automated, microprocessor controlled electrolyte systems that use current ISE (Ion Selective Electrode) technology to make electrolyte measurements. The EasyLyte product line measures various combinations of sodium, potassium, chloride, lithium, calcium and pH in whole blood, serum, plasma, or urine.