When a North American battery manufacturer needed reliable level measurement of their sulfuric acid reservoirs, they turned to Flowline. Lead acid car batteries are basically a positive and negative plate, separated by porous insulating material that allows current to flow between them. The electrolyte is a sulfuric acid and water solution, commonly referred to as battery acid. Highly corrosive and difficult to handle, operators dispense acid through filling stations. Each station has a small reservoir, pump and level sensor. Their level sensors often failed due to corrosion attack. For this reason, Flowline suggested the use of our non-contact ultrasonic sensors that are made of rugged PVDF. The result is reliable battery acid level measurement. Here, an EchoPod ultrasonic level transmitter is mounted on a 2″ stand pipe in each reservoir. The IP68 sensor was easily configured using our free WebCal software. The 4-20 mA signal is connected to the PLC for automatic tank refilling with a high and low level alarm.