Abstract: A diffuser and solids collection system includes a first baffle section having an input for receiving from a petroleum well a fluid carrying solids and a first set of internal baffles for reducing a velocity of the fluid. A second baffle section in fluid communication with the first baffle section has a second set of internal baffles for further reducing the velocity of the fluid. A solids collection container separates the solids from the fluid received from the second baffle section. A weighing system, supported by the second baffle section and supporting the solids collection container, weighs the solids collected in the solids collection container.