spring a vehicle level detector 30 of this embodiment includes a bracket 31 in the form of a l shaped plate serving as a stationary member which is secured onto the vehicle body 1 by a plurality of bolts 32 as can be seen best from fig3 and 4 a box shaped cover 33 is secured to the bracket 31 by a plurality of bolts 34 and nuts 35 with a gasket 36 interposed therebetween a mounting plate 38 is fixedly connected with the top wall of the cover 33 by means of two set screws 39 and a pair of magnetoelectrical transducer elements or hall elements 40 41 are fixedly mounted on the mounting plate 38 the hall elements may be formed by integrated circuit elements in one side thereof the cover 33 is formed with a notch 42 in which is fitted a grommet 43 a plurality of lead wires 45 46 47 48 extend through the grommet 43 and each has one end connected with the hall elements 40 41 the top wall of the cover 33 is formed with an opening contiguous with an axial sleeve 50 which receives a shaft 51 an arm 52 is rotatably mounted on the inner end of the shaft 51 and a magnet 53.