(a.k.a. analog and digital speed controls, speed potentiometer, motor speed sensors)
The basics: a complete line of motor speed control, this category includes DC SCR, AC, low voltage PWM, brushless DC, digital speed controls, digital speed pots and speed sensors. Digital DC speed control is known for accuracy, repeatability and flexibility. Digital speed pots can replace 3-wire analog speed potentiometers and display percent of full motor speed.