Patent ID: 7069796

Claim:
A dynamometer ( 10 ; 10 a ; 10 b ), in particular for determining the weight on a seat in a motor vehicle, having a pickup element ( 11 ; 11 a ; 11 b ), which has two bearing points ( 16 , 17 ) spaced apart from one another, having a recess ( 27 ; 27 a ; 27 b ) in the pickup element ( 11 ; 11 a ; 11 b ) in the region between the two bearing points ( 16 , 17 ), having a rodlike element ( 37 ; 50 ) not subjected to bending forces, whose free end, when a load is exerted on the pickup element ( 11 ; 11 a ; 11 b ), is deflected by a force (F) to be measured, and having a measurement array ( 33 ) for detecting the deflection of the free end of the rodlike element ( 37 ; 50 ), wherein the measurement array ( 33 ) includes a magnet ( 32 ) and a magnetic-field-sensitive sensor ( 35 ), wherein the magnet ( 32 ) and the magnetic-field-sensitive sensor ( 35 ) are disposed stationary relative to one another, and wherein the magnet ( 32 ) is spaced closely apart from ferromagnetic material, characterized in that the magnet ( 32 ) is disposed inside an elongated recess ( 30 ; 30 a ; 30 b ) of the ferromagnetic material; and that the longitudinal axis of the recess ( 30 ; 30 a ; 30 b ) extends transversely to the direction of the force (f) to be measured and to the length of the rodlike element ( 37 ; 50 ).