Analysis of the Accuracy and Precision of Load Cell Sensors in IoT-Based Water Mass Measurement

English

Abstract

Accurate and precise mass measurement is an important aspect of sensor based measurement systems. Load cell sensor are widely used for mass measurement because they can convert applied load into measurable electrical signal and can be integrated with Internet of Things (IoT) system. However, the measurement performance of a load cell needs to be evaluated based on its characterization, accuracy and precision. This study aims to analyze the characterization, accuracy and precision of a load cell sensor in measuring water mass using an IoT-based measurement system. The research employed an engineering research approach through the design, assembly, calibration, and testing ig the measurement system. Characterization results indicate a linear relationship between the applied load and the ADC output, with a coefficient of determination (R²) of approximately 0.9997. Accuracy testing was conducted using 12 variations of water mass, while precision testing was performed through 15 repeated measurement. Accuracy was determined by comparing the measures mass with the reference mass, while precision was evaluated based on the consistency of repeated measurements. The accuracy test resulted get an average of 98.11%. the precision test produced average measures=d mass of 58.90 gram and an average precision of 98.81%. these result indicate that the load cell provides relatively accurate and consistent measurement of water mass within the tested measurement range. Therefore, the load cell demonstrates good performance and is suitable for water mass measurement in an IoT-based instrumentation system.