to conduct electricity typically carbon impregnated flexible rubber silicone plastic etc conductive elastomers are commonly used in electronic keypads and in antistatic products and typically comprise a mixture of silicone rubber and carbon one of the factors affecting the conductivity resistivity and accordingly conductance resistance of the elastomer material are its dimensions specifically its length and cross sectional area altering the length of the material with a constant cross sectional area will changes its conductivity such that the shorter the material the greater its conductivity likewise if the cross sectional area is altered while its length remains constant a change in conductivity will take place such that the greater the cross sectional area of the material the greater its conductivity when a conductive elastomer is stretched its length increases and its cross sectional area decreases this will dramatically alter its conductive characteristics as a conductive elastomer strip is stretched its resistivity will rise this property makes conductive elastomers very practical for measuring lengthwise positional changes i e stretch as shown in fig4 the conductive elastomer sensor comprises a conductive elastomer 16 mounted on a substrate 12 both ends of the conductive elastomer material 16 are mounted permanently and the conductive elastomer is preferably.