1.
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WIREWOUND - resistance wire wound on an insulated mandrel. Resolution
is in discrete steps as the wiper moves from one wire to another.
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2.
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CERMET - a conductive ceramic/metal mix is coated onto a substrate
and fired at a high temperature. Resolution is essentially infinite, however
contactresistance between the wiper and the cermet element must be taken
into consideration.
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3.
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CARBON COMPOSITION - a coating of carbon material is applied to
a substrate and cured. Resolution is essentially infinite, however contact
resistance between the wiper and the carbon composition element must be
taken into consideration.
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4.
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CONDUCTIVE PLASTIC - a conductive plastic material is generally
molded into the desired resistive element shape. Resolution is essentially
infinite, however contact resistance between the wiper and the conductive
plastic element must be taken into consideration.
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5.
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THIN FILM - a thin coating of resistive metal is evaporated or sputtered
onto a substrate. Resolution is essentially infinite however the resistance
range of the element can be limited. |