Abstract: A sensor device having one or more sensor elements to provide first positioning information indicative sensor device position with respect to an object of interest is detachably mounted to an appliance on which the object is disposed. A moveable member of the appliance is actuated to effect change in relative positioning of the sensor device and object while one or more appliance-integrated sensor components generate second positioning information indicative of change in spatial position of the moveable member. A processing unit synthesizes, from the first and second positioning information, third positioning information indicative of a spatial position of at least one of the sensor device or the moveable member after actuation of the moveable member.