When the Xishiqiao Water Treatment Plant needed reliable level measurement of their clarifier tanks, they turned to Flowline. Water is pumped from the Changjiang river into each clarifier, where it drains over time, passing through the sand filter bottom. The level measurement of each tank is critical to this process and the operators had experienced problems with pressure sensors due to clogging, and ultrasonic sensors due to condensation build up on transducers during periods of morning dew. For this reason, Flowline suggested the use of our reflective ultrasonic sensors that work in condensation. The ultrasonic sensors provide continuous level data to the SCADA system, which in turn, monitors each tank, and periodically refills them. Flowline is reliable level measurement.