Proximity Magnetic Sensors Magnetic units CL Series • Rectangular, cylindrical or trapezoidal housing • Several dimensions • Side or front operating mode Product Description Ordering Key CL 2 The CL magnetic units, used for operating magnetic prox- imity sensors, consist of permanent magnets sharply sized for the job they are intended.Theirshapecan be rectangular, cylindrical or trapezoidal. Block-shapedmagnetic units must beplaced on non-magneticsupports. Their minimum thickness must be in accordance with the one listed in the table “Type Selection”, in parallel to the switch longitudinal axis. Magnetic unit Type General Specification ShapeHousing material Magnetic material*Minimum separation** Reference Rectangular Plastic Alnico10 CL1 Plastic Alnico20 CL2 Plastic Alnico30 CL3 Plastic Alnico50 CL4 CylindricalPlastic AlnicoNot mandatory CL10 Plastic AlnicoNot mandatory CL11 - FerriteNot mandatory CL18 - FerriteNot mandatory CL23 - FerriteNot mandatory CL31 - FerriteNot mandatory CL20S1 Plastic FerriteNot mandatory CL20S3 TrapezoidalPlastic AlnicoNot mandatory CL90 Distances are specified in millimeters (mm) * see Magnetic Material Description table for more details. ** minimum distance required between two magnetic units on the same axis. Magnetic Material Description The principalmaterials,by which the above mentioned magnetic units are realized, can be classified in: - Ferrite: is a mixture made of iron oxide and barium carbonate (or strontium) and is obtained through a dry or wet way sintering process. - Alnico: is a mixture made of iron, aluminum, nickel, cobalt and other elements in lower percentage it is obtained through fusion anditsprincipalfeatures are the hardness and the relative resistance tohits, the high value of magneti- zationandthepossibility to be used at high temper- atures. Specifications are subject to change without notice (29.08.14) 1
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