Instument used to measure wind?
The wind direction is measured with wind vanes or wind socks.
The wind speed is measured with an anemometer.
There really isn't something to measure the amount of wind, I believe that you are referring to wind speed and direction. The instruments that are used to measure wind speed is the anemometer. Also, for wind direction, we would use a wind vane. You can feel the direction of wind.... I guess humans are like one giant wind vane!