Digital 4-in-1 Anemometer — Wind Speed, Temperature, Humidity & Barometric Pressure

Four atmospheric variables captured simultaneously — the same parameters that drive every weather model from local forecasts to global climate simulations.

Wind speed measurement in this device uses a three-cup anemometer whose rotation rate (angular velocity) is linearly proportional to wind speed via Magnus-effect aerodynamics — a relationship Lord Kelvin quantified in the 1860s. The capacitive humidity sensor exploits the change in dielectric constant of a polymer film as water molecules adsorb, while the MEMS barometric sensor measures atmospheric pressure via piezoresistive strain in a microfabricated silicon diaphragm. Together these four channels provide the data for Beaufort-scale assessment, siting renewable energy systems, or full atmospheric soundings.

• Wind: 0–30 m/s (0.1 m/s resolution), Beaufort scale display
• Temperature: −10 to 60 °C (±0.5 °C); Humidity: 10–99% RH (±3%)
• Barometric pressure: 300–1100 hPa with altitude mode
• Data logging to micro-SD; USB-C charging; backlit LCD + graphical trend display

Every purchase directly funds independent physics research at the Golden Physics Project.