P4.01-2 Meteorological instruments: Anemo-, wind path -, Altimeter and Barograph Anemometers There are several methods for the measuring of wind: instantaneous wind measuring (actual), the wind path meter (day averages) and the continuous registration (wind speed and  wind direction). In addition an altimeter and a barograph have been included in our product range to determine and register height and air-pressure. 16.53  Anemometer Measuring of local wind speed. 16.57 Wind path meter The wind path meter is equipped with a counting device for the determination of the wind path.  A simple determination of the day-average: for instance important for evaporation studies. 16.61 Self-recording wind path and wind direction recorder A light metal mechanical self-recording wind speed meter to record the wind direction and wind speed. 16.05 Altimeter The altimeter indicates heights above sea level. The principle employed is that of a sensitive aneroid barometer which responds to small variations in atmospheric pressure. 16.08 Barograph Temperature compensated measuring device with eight segment measuring element.