This study aims to comprehensively evaluate the performance of traditional optical turbidimeters (OBS-3A, OBS-3+, and RBRsolo) and a new optical turbidimeter (AQUAlogger310TYPT) in observing suspended sediment concentration, and to explore the feasibility of further improving the quality of suspended sediment concentration observation results. Through indoor experiments, key indicators such as measurement range, high-frequency data stability, and particle size sensitivity were analyzed, and equipment selection suggestions for different observation needs were proposed. Field observation experiments have initially verified the effectiveness of synchronous observation of AQUAlogger310TYPT and OBS-3+ in improving the quality of near-bottom suspended sediment concentration data. However, in order to optimize the correction methods and further improve the accuracy and reliability of the observation results, future research still needs to further explore the impact of changes in suspended sediment particle size on observation results, and grasp the patterns of suspended sediment particle size changes in the observation water area.