A filtration testing system is provided. The filtration testing system includes one or more filtration systems configured for filtering a fluid. A filtration system of the one or more filtration systems includes one or more filter units. The filtration testing system further includes a gas detector configured to quantify gas in the fluid at a downstream side of the one or more filter units of the one or more filtration systems. The gas detector is configured to generate a gas quantification, compare the gas quantification to a predetermined gas characteristic, and detect a fault in the one or more filtration systems if the gas quantification exceeds the predetermined gas characteristic.