Construction of a Wind Speed Measurement System Using Hall Effect Sensors for Meteorological Applications in Katsina State

Background: Accurate wind speed measurement is essential for wind energy resource assessment and meteorological monitoring in North West Nigeria, where wind energy potential remains underutilised. Aim: This project constructed and calibrated a wind speed measurement system based on Hall effect sensor anemometry for deployment in Katsina State. Methods: A cup anemometer was fitted with a Hall effect sensor producing pulse outputs proportional to rotation speed. An Arduino Mega processed pulse frequency and computed wind speed using calibration equations derived from wind tunnel testing. Results were displayed on an LCD and logged to an SD card. Calibration validation was performed against a certified cup anemometer over a wind speed range of 0 to 20 m/s. Results: The constructed anemometer showed a mean absolute error of 0.21 m/s compared with the reference standard. Data logging at one-minute intervals operated reliably over a 72-hour field deployment. Starting wind speed threshold was 0.8 m/s. Conclusion: The Hall effect-based wind speed measurement system is accurate, affordable, and suitable for meteorological monitoring and wind energy resource assessment in North West Nigeria. Further development should include integration with solar power and wireless data transmission. Keywords: wind speed, Hall effect sensor, anemometer, meteorology, Katsina State.