| WM4 and WM5 Wall Mountable Masts |
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NOTE: WM4 AND WM5 ARE AVAILABLE ONLY UNTIL STOCKS ARE EXHAUSTED.
Our WM4 and WM5 wall-mountable masts are suitable for some applications where anemometers and/or windvanes need to be mounted close to the edge of a roof (or near a roof gable end). Suitability depends on the construction of the wall and upon the reason for making wind measurements - it is possible that the shape of the roof, structures on the roof (chimneys/vents etc.), the building itself or nearby buildings will cause turbulence which will affect the accuracy of the measurements which may be a problem if general wind conditions are to be measured (a separate/taller mast may be required), however in applications such as restricting access to a roof etc. the wind near the roof is what is actually to be measured.
The WM4 mast is 4m long overall, and is mounted to the wall using 2 'A'-frame brackets. The WM4 typically protrudes up to 2.5m above the upper mounting bracket, the extent to which it protrudes above the roof depends upon the design of the edge of the roof itself.
The WM5 mast is slightly longer at 5m overall length, and will therefore protrude slightly further.
To mount a single anemometer or windvane it is necessary to use a 405/135 type mounting adaptor. If a pair of instruments are to be mounted together, use a 405-1/135 dual-mounting arm (cross-arm).
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IMPORTANT: When installing wall mountable masts like the WM4 or WM5, consideration must be given to the strength of the wall to which the mast is to be mounted. Suprisingly large forces can be exerted on masts supporting anemometers and windvanes during high winds and these forces will be transmitted to the wall through the mounting brackets. These forces are strong enough to crack the wall and/or cause the brickwork to part. This is especially the case if the mast is installed near to a gable-end (i.e the peak of a wall under a pointed roof). If there is a risk of this happening, you are advised to choose a different wall to mount the mast on or to strengthen the wall in some way.
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A100 Series Anemometers