Greyline Flow Switches

Greyline flow switches, such as the DFS 5.1 Doppler Flow Switch, are mechanical devices designed to trigger an action – such as on/off—based on a chosen setpoint. This, in turn, controls the movement of gas, steam or liquid in a process. Most flow switches are categorized as doppler, paddle, thermal, or ultrasonic. Common applications include heating and cooling, liquid transfer, and water flow.