Standard potentiometer is more cost effective

Standard potentiometer is more cost effective than the alternative technologies, especially when tight resolution and linearity requirements are an important factor in the design. One of the primary characteristics to consider when selecting a potentiometer angle sensor is how the system recovers after a power loss. In the case of potentiometers, the system has no need to reposition to an origin or index mark; it will provide the output voltage that corresponds to its current position. In the case of digital devices, the system has no real method to determine its current position unless it re-indexes or returns to an origin. Unfortunately, in most system applications, returning a system to a position other than its current position is impractical and takes both power and time. Furthermore, it may not be possible to reposition the system if doing so can affect the current mission-critical parameters.