Hunter Industries WFS-R Owners Manual Page: 6

The WFS is typically installed near the point of connection, in an
appropriately-sized FCT tee.
The WFS transmitter can connect to a host controller up to
500 ft/150 m away.
WFS sensors operate with an impeller positioned in the
ow through the pipes.
As the impeller turns, pulses are generated to the controller,
which converts them to gallons or liters, depending on the units of
measurement selection in the controller.
WFS is a reporting device, and does not respond to ow situations
on its own. WFS should be installed in conjunction with a master
valve, which can stop ow in a damaged pipe when high ow
conditions are detected and with an isolation valve for service and
Hunter controllers equipped with flow terminals will have
approximately 20 VDC present on the flow sensor terminals, with no
flow input.
When flow begins, the voltage will pulse. On a standard voltmeter, the
voltage will appear to drop, or pulsate. On voltmeters equipped with a
frequency counter, the pulse frequency can be measured in Hz.
Proper System Maintenance and Operation
It is important to ensure that your irrigation system is maintained and
functioning properly for optimum performance. Check your irrigation
system for any broken components or leaks, making sure that all
sprinklers are operating within the pressure ranges recommended by
the manufacturer.