Abstrak -Telah berhasil dibuat alat ukur tekanan udara menggunakan sensor BMP280 berbasis Arduino Uno. Alat ukur tersebut distandarisasi dengan alat ukur standar di Balai Besar Meteorologi, Klimatologi dan Geofisika (BMKG) Wilayah III Tuban Bali. Dari hasil standarisasi diperoleh persamaan kalibrasi y=1,0022x -1,8907 dengan nilai koefisien determinasi (R 2 ) 0,99998. Ini menunjukkan bahwa hasil pengukuran dari alat ukur yang dibuat memiliki tingkat akurasi dan presisi yang tinggi.Abstract -An air pressure gauge instrument has been successfully made using the Arduino Uno-based BMP280 sensor. This instrument was standardized by using a standard measuring instrument at the Central Bureau of Meteorology, Climatology and Geophysics (BMKG) Region III Tuban Bali. It was obtained that the calibration equation is y = 1.0022x -1.8907 with a coefficient of determination (R 2 ) of 0.99998. This shows that the instrument made has a high degree of accuracy and precision.
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