Volumetric flow rate is one of the most often measured parameters in hydraulic systems. There are many sensors and transducers available on the market that operate based on various physical phenomena. However, using dedicated, high-accuracy flow meters may be difficult in some cases due to the limited measuring range or high cost. This article provides an analysis of the usability and accuracy of small, inexpensive, low-pressure, turbine-based or gear-based flow meters dedicated to pressures up to approximately 2 MPa. The research included formulating a mathematical model of a hydraulic test system, creating a simulation model, carrying out numerical simulations, building a dedicated test bench and performing laboratory experiments. Four types of low-cost sensors were tested, including one gear-based and three turbine-based. The results were compared to the reference high-accuracy sensor and analytical calculations based on the actuator displacement, showing medium to high convergence.