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XNR-450E熔(rong)體流(liu)(liu)動(dong)(dong)(dong)速(su)率(lv)(lv)(lv)測(ce)定(ding)(ding)儀（熔(rong)融指數儀）適用(yong)于(yu)測(ce)定(ding)(ding)熱塑(su)性(xing)塑(su)料熔(rong)體流(liu)(liu)動(dong)(dong)(dong)速(su)率(lv)(lv)(lv)。可(ke)以測(ce)定(ding)(ding)熱塑(su)性(xing)高聚物在高溫下(xia)的(de)流(liu)(liu)動(dong)(dong)(dong)性(xing)，儀器(qi)具有質量(liang)法(fa)和體積法(fa)兩種測(ce)試方(fang)法(fa)。測(ce)定(ding)(ding)熔(rong)體質量(liang)流(liu)(liu)動(dong)(dong)(dong)速(su)率(lv)(lv)(lv)采(cai)用(yong)自動(dong)(dong)(dong)取(qu)樣，天(tian)平(ping)稱量(liang)的(de)方(fang)式；測(ce)定(ding)(ding)熔(rong)體體積流(liu)(liu)動(dong)(dong)(dong)速(su)率(lv)(lv)(lv)是通過(guo)位移(yi)傳(chuan)感(gan)器(qi)和自動(dong)(dong)(dong)計(ji)時系統，先自動(dong)(dong)(dong)測(ce)量(liang)出活塞移(yi)動(dong)(dong)(dong)規定(ding)(ding)距離所需的(de)時間，然后根(gen)據公(gong)式自動(dong)(dong)(dong)計(ji)算出體積流(liu)(liu)動(dong)(dong)(dong)速(su)率(lv)(lv)(lv)。兩種測(ce)定(ding)(ding)方(fang)法(fa)的(de)最(zui)終結果都(dou)顯示在儀器(qi)的(de)液晶屏上，并由微型(xing)打印機輸出。