所有的比较器，除了数字元件是用逻辑状态作为输入外，其余的都是用模拟参数的实际值作为输入。元件分为两类，多套整定值类与控制类。多套整定值类的每一个元件，都有八套可以替换的整定值，编号为 1 到 8。
SEW EURODRIVE FA37/GDT80N4/BM?G/HR/TF/ABC8 PARALLEL SHAF
COOPER B-LINE SYSTEMS SFC-FUSE-CAB SPARE FUSE CABINET,
COOPER B-LINE TYPE 1 HINGE COVER ENCLOSURE, 36 X 24 X 8
ALLEN BRADLEY SP-155970 BALANCING RESISTOR, NIB, SEALED
PERMA CLASSIC AUTOMATIC LUBRICATOR, 4.06 fl.oz., LOT OF
DANAHER 120506-397 CONTROL COUNTER, NIB
RHP 7212ETDUMP4 SUPER PRECISION BEARING ? SET, NIB
RHP 6205TBR12P4 SUPER PRECISION BEARING ? SET, NIB
ALLEN BRADLEY 160-BMA2 200-240V 2-3HP SERIES A DYNAMIC
ALLEN BRADLEY 160-BMA2 DYNAMIC BRAKE MODULE
ALLEN BRADLEY SP-135774 CURRENT TRANSFORMER KIT, 3-30 H
MARZOCCHI BOLOGNA M63 4 GEAR MOTOR, NNB
EDWARDS 51R-N5-40W LIGHT, NIB
TIMKEN / FAFNIR MM9311WI 3H DUH SUPER PRECISION BEARING
FANUC DE-2004-904 CABLE ASSEMBLY, 9 PIN FEMALE,
