Abstract: A measurement apparatus includes an observation unit, a movable base, a platform, a pair of tracks mounted on two sides of the platform, and a console. The observation unit is slidably mounted on the movable base. The movable base is a bridge structure. Each end of the movable base is slidably mounted on each one of the pair of tracks. The movable base slides on the pair of tracks along an X-axis of the platform. The observation unit slides on the movable base along a Y-axis of the platform. The observation unit includes a camera. The camera is moveable relative to the observation unit along a Z-axis of the platform.

Abstract: A measuring device, includes a guiding rail, a sliding unit levitatedly slidably engaged with the guiding rail, and a measuring unit fixed to the sliding unit and comprising at least one dial gauge mounted thereto.

Abstract: A measuring device, includes a guiding rail, a sliding unit levitatedly slidably engaged with the guiding rail, and a measuring unit fixed to the sliding unit and comprising at least one clock gauge mounted thereto.