三十萬級(ji)凈(jing)(jing)(jing)(jing)化車(che)間(jian)標(biao)準空(kong)(kong)氣(qi)(qi)(qi)(qi)潔(jie)(jie)凈(jing)(jing)(jing)(jing)度(du)是潔(jie)(jie)凈(jing)(jing)(jing)(jing)環境(jing)中(zhong)(zhong)(zhong)空(kong)(kong)氣(qi)(qi)(qi)(qi)含懸浮粒子(zi)量(liang)的(de)多少的(de)程度(du)。通常(chang)空(kong)(kong)氣(qi)(qi)(qi)(qi)中(zhong)(zhong)(zhong)含塵濃(nong)度(du)低(di)則空(kong)(kong)氣(qi)(qi)(qi)(qi)潔(jie)(jie)凈(jing)(jing)(jing)(jing)度(du)高，含塵濃(nong)度(du)高則空(kong)(kong)氣(qi)(qi)(qi)(qi)潔(jie)(jie)凈(jing)(jing)(jing)(jing)度(du)低(di)。按空(kong)(kong)氣(qi)(qi)(qi)(qi)中(zhong)(zhong)(zhong)懸浮粒子(zi)濃(nong)度(du)來劃分潔(jie)(jie)凈(jing)(jing)(jing)(jing)室及(ji)相關(guan)受控環境(jing)中(zhong)(zhong)(zhong)空(kong)(kong)氣(qi)(qi)(qi)(qi)潔(jie)(jie)凈(jing)(jing)(jing)(jing)度(du)等級(ji)，就是以每立方米空(kong)(kong)氣(qi)(qi)(qi)(qi)中(zhong)(zhong)(zhong)的(de)允許(xu)粒子(zi)數(shu)來確定(ding)其空(kong)(kong)氣(qi)(qi)(qi)(qi)潔(jie)(jie)凈(jing)(jing)(jing)(jing)度(du)等級(ji)。三十萬級(ji)凈(jing)(jing)(jing)(jing)化車(che)間(jian)標(biao)準以每立方米>=0.5μm微塵粒子(zi)數(shu)目來設定(ding)的(de)。