DC tachometer: V*
Ironless rotor Commutation system made of precious metals

Delivers a continuous signal
Adds neglectable inertia
Constant signal quality

Easy control even at very low speeds
Little additional load for the motor
Low sensitivity to hostile environments

Magnetic encoder: P*
Encoder integrated in the motor
Position monitored by Hall sensors

Simple construction
Compact design
Two output channels

Insensitive to hostile environments
Negligible increase in length of the unit
Very low current consumption
High reliability and long life

Optical encoder: P+V*
Phototransistors in push-pull
Stand-by mode
Mask integrated on receivers

High resolution
Two channels plus Home position
Signal level very stable
Cuts LED supply at stall
No thermal drift

Very precise positioning
Facilitates counting the number of revolutions
No phenomenon of aging
Lower consumption, lower temperature rise
Insensitive to temperatures, small dimensions