451126 Datasheet, PDF (9/10 Pages) Extech Instruments Corporation. – Vane Thermo-Anemometer Datalogger

Useful Equations and Conversions
Area equations
Rectangular Duct _H
Area = W x H
W
Circular Duct
R
A= π R ²
(A= 3.14 x R x R)
Cubic equations
CFM (ft³/min) = Air Velocity (ft/min) x Area (ft²)
CMM (m³/min) = Air Velocity (m/sec) x Area (m²) x 60
Units Conversion Table
1 m/s
1 ft/min
1 knot
1 km/hr
1 mph
m/s
1
0.00508
0.5144
0.2778
0.4464
ft/min
196.87
1
101.27
54.69
87.89
knots
1.944
0.00987
1
0.54
0.8679
km/hr
3.6
0.01829
1.8519
1
1.6071
mph
2.24
0.01138
1.1523
0.6222
1
9
Model 451126 V2.0 6/08