• It can see a flow at first sight.
• It is a rheoscope confirming fluid flow by the movement of transparent balls (or a float) in the jurisdiction.
• It cannot confirm the flow quantity.
• With protective cover by a metal protective cover, it reduce possibility of the damage by shocks from the outside.
• The installation direction does not matter because it use a spring inside, the posture when I attach it looks up and looks down and can perform sideways-facing freely.

List of models