Despite the plant floor tendency to use "sensor" and "vision" interchangeably there has always been a real distinction between the two Cognex Corp director of product marketing George Blackwell notes that "machine vision sensors deal with images Learn more

IEN How do you define the difference between machine vision sensors and discrete sensors?Blackwell Machine vision sensors deal with images rather than discrete inputs such as force strain load or temperature As a result vision sensors typically Learn more

Sound waves can travel through gases liquids and solids The ability of a sound wave to travel through a particular medium depends upon the frequency and the amplitude of the sound wave and the properties of the material through which it travels Learn more

Six ultrasonic transducers beneath platform of Model 15VPSP detect obstructions to descent path prompting halt of travel accompanied by audio and visual alarms Sounding horn resets alarm where upon descent can continue Controlled by joystick Learn more