When the city of Ontario, California needed reliable level measurement of their hydrochloric acid bulk storage tanks, they turned to Flowline. The city uses HCI to neutralize waste streams at their water treatment plant, where the operators were dissatisfied with inconsistent readings from their ultrasonic sensors, caused by vapor and acoustic signal attenuation. HCI is extremely vaporous and corrosive. Therefore, Flowline suggested the use of our non-contact radar sensor with an impervious PTFE antenna shield. Now two years later and the sensors continue to perform flawlessly. The radar sensors provide continuous level data to the SCADA system, which in turn, monitors the tanks, and alarms for replenishment. Flowline is reliable level measurement.