When a Washington state municipality needed reliable level measurement of their aluminum sulfate tanks, they turned to Flowline. Aluminum sulfate is a highly acidic, hygroscopic compound that’s often used as a water treatment filter agent. The soluable crystals bind or clump with impurities, and increase filter efficiency. In high concentration, aluminum sulfate can have a pH value as low as 2. The operators experienced shortened level sensor life, and required a non-contact, corrosion resistant sensor. Additionally, the tanks are in a hazardous area due to methane, and they required intrinsic safety. For these reasons, Flowline suggested the use of our intrinsically safe ultrasonic sensors that are ideal for corrosive chemical feed applications. The ultrasonic sensors provide continuous level data to the SCADA, which monitors and controls the chemical feed process. Flowline is reliable level measurement.