The pendular mass is the internal mechanical component of Berkel model D (900/D) clock-face scales: swinging on its pivot, it balances the weight on the pan and transmits the movement to the needle that shows the weight on the dial.

• Brand/model: Berkel D (900/D)
• Scale type: mechanical automatic clock-face scale
• Function: swinging counterweight of the weighing mechanism

This is the part to replace when the weight reading on the dial is inaccurate, when the mass is deformed or loose on its pivot, or when the swing is no longer smooth - typical wear conditions on this type of mechanical Berkel scale.