The UltraFlo 4000 utilizes ultrasonic technology as is capable of measuring both conductive and non conductive liquids, It is an excellent chose for very corrosive liquids such as strong acids and alkalies. The UltraFlo 4000 has no moving parts and has been engineered to measure pulsating, dosing as well as metering flow. All parts that contact the liquid are made of corrosion resistant Polysulfone.