HFS Water Flow Switch

The paddle-type SPDT HFS series is designed to provide excellent performance where accuracy, reliability, and rugged construction are required in liquid flow lines carrying water or any fluid that is neither harmful to brass and phosphor bronze nor classified as a hazardous fluid.

They can be wired to close one circuit and open a second circuit when liquid flow either exceeds or drops below the adjusted flow rate.

The HFS series is recommended for the liquid pressure and temperature ranges mentioned below and must not be used in lines carrying liquids below 0°C.

This series may be used with liquids that have high salt or chlorine content, but it is not suitable for use in hazardous atmospheres.

They may also be used outdoors but must be protected from weather and splashing water. All HFS series flow switches are designed for use only as operating controls.

Where an operating control failure could result in personal injury and/or property loss, it is the user’s responsibility to add safety devices that provide protection or supervisory systems that warn of control failure.