A 3 MPH wind means a toxic gas can travel 264 feet in 1 minute!^* Ordinary windsocks cannot detect low wind movement, only the Wind Tracker Windsock System can.
*(Courtesy of University of Exeter.)

How To Position Your Wind Tracker Windsock System:

Placement of the Wind Tracker Windsock System™ is very important. When considering a windsock location the differences between a visual only location and, the “true wind” occurrence is very important. Evacuation lanes, and their routes must be taken into consideration. Improper placement could lead to an unsafe evacuation of personnel to a safe assembly area.

Windsocks in the wrong place:
The average windsock is most commonly positioned at high elevations (at the top of a silo or large building) for everyone to see. This may be good for inbound assistance (approaching fire equipment, ambulance, etc.) to the facility but actually can be misleading at the ground level. The problem is the wind speed and direction is not always the same in both locations.

Wind direction, force, and speed:
Wind direction and wind action at lower elevations can vary dramatically. Structures, landscaping, temporary impediments like parked cars, type of area paving, elevation, climate, and other conditions can effect the wind direction, speed, and movement. Along with this, many airborne agents are heavier than air or are prevented from rising due to weather conditions such as fog, which keeps them close to the ground.

Two major field placement factors you should consider:
The first is line of sight, and the second is accuracy. Place one or more Wind Tracker Wind Systems where they can be seen from the ground from various locations throughout the facility. We recommend you first identify the lanes of evacuation, the assembly areas that will be used for evacuation and the line of sight associated with each of these. Place the Wind Tracker™ units in various locations and/or heights to assure line of sight, and accuracy of wind speed and direction.