Alat Ukur Kadar Hemoglobin Non-Invasif Berbasis Sensor Optik Dual-Wavelength dengan Metode Modified Beer-Lambert Law

P, A'isyatuz Zahro (2026) Alat Ukur Kadar Hemoglobin Non-Invasif Berbasis Sensor Optik Dual-Wavelength dengan Metode Modified Beer-Lambert Law. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pemeriksaan kadar hemoglobin umumnya masih dilakukan secara invasif melalui pengambilan sampel darah sehingga dapat menimbulkan ketidaknyamanan, risiko infeksi, dan limbah medis. Penelitian ini bertujuan merancang alat ukur kadar hemoglobin non-invasif berbasis sensor optik dual-wavelength menggunakan metode Modified Beer-Lambert Law (MBLL) serta mengevaluasi performa sistem yang dikembangkan. Sistem menggunakan LED 660 nm dan 940 nm sebagai sumber cahaya, fotodioda BPW34S sebagai sensor, rangkaian penguat sinyal, dan mikrokontroler ESP32 sebagai pengolah data. Sinyal hasil pengukuran diproses menggunakan Butterworth Band-Pass Filter, kemudian dihitung menggunakan metode MBLL untuk memperoleh estimasi kadar hemoglobin. Pengujian dilakukan pada 110 responden dengan membandingkan hasil pengukuran non-invasif terhadap alat ukur hemoglobin invasif sebagai acuan. Hasil penelitian menunjukkan bahwa sistem mampu mengestimasi kadar hemoglobin secara non-invasif dengan nilai Mean Absolute Error (MAE) sebesar 4,26 g/dL, tingkat akurasi 70,31%, dan rentang pengukuran 6,7–11,4 g/dL.
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Conventional hemoglobin measurement is generally performed using an invasive blood sampling method, which may cause discomfort, increase the risk of infection, and generate medical waste. This study aims to develop a non-invasive hemoglobin measuring system based on a dual-wavelength optical sensor using the Modified Beer-Lambert Law (MBLL) and to evaluate the performance of the developed system. The system employs 660 nm and 940 nm LEDs as light sources, a BPW34S photodiode as the optical sensor, a signal conditioning circuit, and an ESP32 microcontroller for data processing. The acquired signals are processed using a Butterworth Band-Pass Filter, and the MBLL method is applied to estimate hemoglobin concentration. The system was evaluated using 110 participants by comparing the non-invasive measurements with invasive hemoglobin measurements as the reference. The results show that the developed system is capable of estimating hemoglobin concentration non-invasively with a Mean Absolute Error (MAE) of 4.26 g/dL, an accuracy of 70.31%, and a measurement range of 6.7–11.4 g/dL.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	hemoglobin, non-invasif, Modified Beer-Lambert Law, fotodioda, spektroskopi, hemoglobin, non-invasive, Modified Beer-Lambert Law, photodiode, spectroscopy.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA1573 Detectors. Sensors
Divisions:	Faculty of Vocational > Instrumentation Engineering
Depositing User:	A`isyatuz Zahro P
Date Deposited:	11 Aug 2026 09:16
Last Modified:	11 Aug 2026 09:16
URI:	http://repository.its.ac.id/id/eprint/144309

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