Mear Gas Flow Calculator for Plastic Pipes

Country of manufacture: England,            Date of manufacture: ____
Diameter: 19.5 cm,      Weight: 152.5 gms
Materials: all plastic
Scales: numerous, specialty
Front
     Outer Disk: Pressure Loss, Pressure Loss, Flow rate
     Inner Disk: Bore of Pipe, Length of Pipe
     Cursor: Average Line Pressure, Indicator points for various gases, Instructions
Back
     Outer Disk: Flow Rate, Bore of Pipe, Velocity, Length to Add
     Inner Disk: Type of fitting, Length to Add Indicator, Bore of Pipe, Gauge Pressure in Pipeline, Instructions
Condition: C0 (Mint with all accessories)
Came with: Red plastic slipcase w/snap closure, manual