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The E-Series generator is the smallest tach among those offering similar technical characteristics. Many outstanding features make it particularly suitable for use in all types of servo systems. Although the diameter is only 0.760", the E Series provides a 3 volt/1000 rpm output and linearity better than 0.1% at 3600 rpm. With driving torque of only 0.25 oz-in., and inertia of just 0.25 x 10^-4 oz-in.-sec^2, E Series gives design advantages not available with competitive units.