A compound of the formula, , or 1wherein Z, A, B, C, R, R1, R2, Q, and n are as described herein. A measurement device, which is connected to a data processing device, is provided, for measuring a measurement parameter influenced by the weight force of said bale in each of said first and second positions and developing a signal representative of the weight of the bale at those positions. A light source may also be positioned within the chamber such that light from the light source is directed at the reflective or refractive membrane. The console is an enclosure that is capable of housing each coupling site. The sleeve has an outer surface and an inner surface.