DC- Tachogenerator 

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Tachometers:
Revolution Counter and Timer Tachometer : • Revolution Counter and... ,
Tachoscope: • Tachoscope ,
HandSpeed Indicator : • Hand Speed Indicator ,
Slipping Clutch Tachometer : • Slipping Clutch Tachom... ,
Centrifugal Force Tachometer : • Centrifugal Force Tach... ,
Vibrating Reed Tachometer : • Vibrating Reed Tachometer ,
Photoelectric Tachometer : • Photoelectric Tachometer ,
Stroboscope Tachometer : • Stroboscope Tachometer ,
Inductive Pickup Tachometer : • Inductive Pick up Tach... ,
DragCup Tachometer : • Drag Cup Tachometer ,
Capacitor Tachometer : • Capacitor Tachometer ,
Commutated Capacitor Tachometer : • Commutated Capacitor T... ,
AC -Tachogenerator: • AC -Tachogenerator ,
DC-Tachogenerator: • DC- Tachogenerator