Designed for 1" ID tube to provide a visual confirmation that fluid is flowing through the lines. This was designed to be used with an engine dyno coolant line that is low pressure and operates at temperatures around 200 degrees Fahrenheit.

Cost Savings

Designed using FreeCAD OS software to reduce cost.

The desired fitting is able to be interchanged within the housing to allow for male barbed or male threaded inlet and outlet.

Material: 

• Housing: $1.75
• Barbed Fitting: $0.27 x 2
• Wheel: $0.27 
• Lens cover: TBD

Link - Similar products that accommodate a 1" ID tube cost around $140. 

$140 - ($1.75 + $0.27 x 3) = $137.44

Orientate the spinning wheel into the housing with the curved edge facing against the incoming fluid flow.