A transport device which is, unloaded and loaded, configured to travel in its longitudinal direction (+Sx) on the ground, the transport device comprising - a frame (110, 210) extending in said longitudinal direction (+Sx), - a transverse axle that is transverse to said longitudinal direction (+Sx), and - a first strain sensor provided in a location which is above or below the centre line of said transverse axle; wherein - said first strain sensor is fastened to its fixing point by at least one screw or bolt, wherein said strain sensor can be replaced by removing said screw, bolt, screws, or bolts, characterized in that - the frame (110, 210) delimits a shielded space extending in the longitudinal direction (+Sx) of the transport device and said first strain sensor is arranged in said shielded space, - the first strain sensor is provided in or on said transverse axle, in a location which is fixed in relation to said frame (110, 210) or is fastened to said frame (110, 210) in a stationary manner in such a way that no movable joint, such as an articulation or bearing, is left between the frame (110, 210) and the first strain sensor; whereby - said first strain sensor is configured to measure the elongation of said transverse axle in said location, and the quantity of the load of the transport device can be calculated on the basis of a signal or response from the first strain sensor and in that the transport device comprises - a compensating strain sensor in said shielded space for compensating for a deviation caused by the operating temperature in the signal from the first strain sensor and - a control unit that is configured to compensate for a deviation caused by the operating temperature in the signal from the first strain sensor. - a frame (110, 210) extending in said longitudinal direction (+Sx), - a transverse axle that is transverse to said longitudinal direction (+Sx), and - a first strain sensor provided in a location which is above or below the centre line of said transverse axle; wherein - said first strain sensor is fastened to its fixing point by at least one screw or bolt, wherein said strain sensor can be replaced by removing said screw, bolt, screws, or bolts, - the frame (110, 210) delimits a shielded space extending in the longitudinal direction (+Sx) of the transport device and said first strain sensor is arranged in said shielded space, - the first strain sensor is provided in or on said transverse axle, in a location which is fixed in relation to said frame (110, 210) or is fastened to said frame (110, 210) in a stationary manner in such a way that no movable joint, such as an articulation or bearing, is left between the frame (110, 210) and the first strain sensor; whereby - said first strain sensor is configured to measure the elongation of said transverse axle in said location, and the quantity of the load of the transport device can be calculated on the basis of a signal or response from the first strain sensor and in that the transport device comprises - a compensating strain sensor in said shielded space for compensating for a deviation caused by the operating temperature in the signal from the first strain sensor and - a control unit that is configured to compensate for a deviation caused by the operating temperature in the signal from the first strain sensor.