Flowline's core technology is non-contact ultrasonic level measurement. This highly versatile and reliable technology is ideal for a wide range of liquid applications including those with chemicals, oil, water and wastewater. Flowline provides thefollowing products for flow: Thermo-Flo Liquid and Gas Flow Switch, Switch-Pro with Compact Relay Controller, Switch-Pro with Compact Junction Box, Flow Switch Compact Relay Controller, and Flow Switch Remote Relay Controller.