Abstract: An apparatus for maintaining a scientific or measuring instrument or the like in a level horizontal plane. The apparatus comprises an inclinometer comprising a support housing and a plumb member freely suspended within the support housing. The plumb member has an exterior surface provided with first sensing means and the support housing has an interior surface provided with second sensing means cooperative with the first sensing means in determining simply variation of the support housing from an exact upright position. Automatic adjustment means are also provided which are responsive to the first and second sensing means for adjusting the support housing to maintain an upright positioning of the support housing and the instrument attached thereto.

Abstract: The present invention provides an inclinometer comprising a supporting housing and a plumb member suspended within that supporting housing. The plumb member is provided on its exterior surface with a sensor, while the supporting housing is provided on its interior surface with a sensor co-operative with the sensor on the plumb member for determining exact upright positioning of the supporting housing. The inclinometer, as arranged above, is useable in many different apparatus, including an apparatus for maintaining a scientific and measuring instrument on a level plane.