An apparatus measuring optical characteristics including position detection is disclosed. A condition may be defined that, when evaluated, may determine whether the error or undesired behavior occurs in a model. The isolation region may thereby define magnetic tunnel junction parts that are disposed under corresponding ones of the mask patterns. Thus, a user only has to handle a single accessory part in order to make use of two different functions enabled by a mobile station. The superimposed mixer valve and al least pressure regulator are assembled together by fastening screws in order to form a block to be inserted intoremoved from the tap body as a single group. Methods of generating same and uses of same are also disclosed.