實驗室標準篩分為三種：標準篩|試驗篩|分樣篩(shai)|實驗(yan)篩(shai)分為三(san)種，每(mei)種的(de)(de)特點和應用(yong)(yong)范圍各不相(xiang)同(tong)：金屬絲編織網(wang)（應用(yong)(yong)廣泛網(wang)孔(kong)(kong)(kong)(kong)從2.36毫米(mi)(mi)到(dao)(dao)0.02毫米(mi)(mi)之間只有方(fang)孔(kong)(kong)(kong)(kong)網(wang)）、沖(chong)孔(kong)(kong)(kong)(kong)板篩(shai)網(wang)（主要應用(yong)(yong)于大網(wang)孔(kong)(kong)(kong)(kong)，有圓孔(kong)(kong)(kong)(kong)和方(fang)孔(kong)(kong)(kong)(kong)兩種網(wang)孔(kong)(kong)(kong)(kong)從0.2到(dao)(dao)幾(ji)百(bai)毫米(mi)(mi)）、電成型篩(shai)網(wang)（主要用(yong)(yong)于高精度(du)的(de)(de)場合(he)，可以做(zuo)到(dao)(dao)每(mei)個網(wang)孔(kong)(kong)(kong)(kong)都(dou)在平均(jun)(jun)誤差(cha)范圍內）。作為標準(zhun)篩(shai)的(de)(de)專業生產廠(chang)家(jia)必須具(ju)備工(gong)具(ju)顯微鏡(jing)和投(tou)影儀，工(gong)具(ju)顯微鏡(jing)是用(yong)(yong)來(lai)檢查網(wang)孔(kong)(kong)(kong)(kong)的(de)(de)精度(du)，采用(yong)(yong)算數平均(jun)(jun)值方(fang)法。
