Abstract: A general purpose belt scale for measuring the weight of material being transported on a conveyor belt includes a pair of load beams, each having a load cell in combination with a force and torque isolator mechanism that isolates the load cell from disturbance forces and torques that would increase the measurement errors. Absence of a crossbar enables the two independent load beams to fit a wide variety of belt widths. Selection of the capacity of the load cells after the weighing application has been determined completes the general applicability of the belt scale for both belt width and load weighing requirements. An alternative embodiment of a selectable mounting location for the load cell within each load beam allows the weight capacity of the belt scale to be varied without changing the load cell's weight capacity.