Why are the products divided into three categories?

Because there are dif­fer­ent require­ments for dif­fer­ent areas of usage. An oper­at­ing the­atre in a hos­pi­tal requires dif­fer­ent stan­dard cri­te­ria for a key­board than a recep­tion desk at a doctor’s prac­tice. We use dif­fer­ent prod­ucts depend­ing on the inten­si­ty of the expo­sure to bac­te­ria or the prob­a­bil­i­ty that con­t­a­m­i­na­tion might take place.