Mounting Accessories. Plastic Cover for Optical Indicator Dome. For DSU35 Dual Sensors. Ident. no.: 6901074. Cover for optical indicator "Dome". Inspection window for indicator 90° rotatable. Hole pattern on flange face 30 x 80 mm (30 x 130 mm); connection shaft (shaft extension) height 20 mm / Ã max. 30. including mounting screws for sensor and actuator