: Switch between liters and gallons by holding MODE and the up arrow for approximately 3 seconds.
The manual is explicit: You need and 5 diameters downstream of straight pipe before the sensor.
The lower bracket is often adjustable; rotate it 180° to switch between supported pipe diameters.
The KEYENCE FD-Q Series is a family of sensors that combines the latest advancements in optical and sensing technologies. These sensors are designed to provide precise detection and measurement of various targets, including transparent and opaque objects, liquids, and small parts. The FD-Q Series features a compact and rugged design, making it suitable for use in harsh industrial environments.
: It is recommended to install on a pipe that is always full of fluid and away from air bubbles or turbulence-causing valves.
For more information on the KEYENCE FD-Q Series, please refer to the following resources:
No article on the FD-Q manual would be complete without a deep dive into the . This is the section you bookmark.
Many users forget the FD-Q series requires periodic checks. The manual specifies:
: Provides stability level indicators (1 to 4 lights) to help diagnose weak signals or improper mounting.
