IDEC vision sensors use images captured by a camera to determine presence, orientation, and accuracy of parts. These sensors differ from image inspection "systems" in that the camera, light, and controller are contained in a single unit, which makes the unit’s construction and operation simple. There are differences between these sensors and other general-purpose sensors. For example, multi-point inspections can be done with a single sensor. In addition, thanks to the wide field of view, detection is possible even when the target position is not consistent.