An omni-directional sensor device is provided for detecting radiation emission sources, such as nuclear and atomic weapons and dirty bombs. An electrical heater includes Y heater segments that are associated with respective ones of the X zones. The obtained ink liquid is ejected by an ink droplet ejecting means disposed in the respective ink ejection ports and a constant amount of ink droplets are flied to the image receiving medium. The control module is capable of varying the reference voltage for residual quantity detection. One of the spacing element or the second plate is arranged for connection to a torque transmitting element in an automotive device, the at least one segment forms a mechanical path between first and second axial ends of the clutch, and the receiving feature and protrusion are lockingly engageable for relative rotation of the first and second plates in a first direction. The insulating and conductive liquids are non-miscible, having different optical indexes and substantially the same density.