<p>A load weighing device compressively interposable between a sprung portion and an unsprung portion of a vehicle and subjectable to a compressive force of a degree corresponding to the load condition of the vehicle. The weighing device, which is adapted for interposition in a fluid pressure circuit, includes means for converting the compressive force to a proportionally reduced force and valve means operable by the reduced force for effecting transmission of a fluid pressure control signal of a degree inversely proportional to the degree of the compressive force. The weighing device may be modified to transmit a fluid pressure control signal directly proportional to the compressive force reflecting the load condition.</p>
