FlowLine DL24-00 EchoPod® Multi-Function Ultrasonic Liquid Level Sensor Transmitter a general purpose ultrasonic level transmitter provides continuous level measurement up to 9.8’ (3m) with a 4-20 mA signal output and four relays, and is configured via our free WebCal software. Each relay is fully configurable for automatic fill, empty or alarm functions, and the embedded level controller may lower cost by replacing external control hardware. Select this sensor for small tanks with non-foaming, non-condensing or highly vaporous media such as chemicals, water, wastewater and oil. Typical applications include IBC or drum, cooling tower, day tank, skid or machine, open channels and chemical feed.