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Purpose <p>In pharmaceutical industries that handle powders, ensuring smooth powder flow is essential for efficient manufacturing and maintaining high product quality. Evaluating powder flowability is a critical step in process control. The angle of repose serves as a key indicator for evaluating the flow characteristics of powdered materials. However, traditional approaches for evaluating the angle of repose involve multiple instruments and manual calculations, making the process time-consuming and prone to inconsistencies. This study aims to develop a digital sensor-based device integrated with image processing software to overcome the limitations of conventional manual and semi-automated methods.</p> Method <p>The proposed device automates the calculation of the angle of repose by combining controlled powder dispensing with digital imaging and software-based analysis. The system is designed to be compact, portable, and operable in remote or resource-limited environments. Validation was carried out using common pharmaceutical excipients with varied flow characteristics [<CitationRef AdditionalCitationIDS="CR2 CR3" CitationID="CR1">1</CitationRef>–<CitationRef CitationID="CR4">4</CitationRef>]. (M, 2005) (M, 2005).</p> Result <p>The digital apparatus demonstrated improved precision and repeatability in measuring the angle of repose compared to traditional methods, providing automated and consistent evaluation of powder flow properties.</p> Conclusion <p>The developed system simplifies the evaluation of powder flowability by automating measurements and calculations, enhancing accuracy, and enabling use in environments lacking fully equipped laboratories, thus offering a practical solution for pharmaceutical process control.</p>

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Novel Apparatus for Angle of Repose Measurement: A Tool for Powder Flowability Assessment

  • 期刊论文

  • 发表日期：

    2026年2月2日

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  • Vrunal More,
  • Prajakta Khule,
  • Archana Kongari,
  • Annasaheb Valgude

摘要

Purpose

In pharmaceutical industries that handle powders, ensuring smooth powder flow is essential for efficient manufacturing and maintaining high product quality. Evaluating powder flowability is a critical step in process control. The angle of repose serves as a key indicator for evaluating the flow characteristics of powdered materials. However, traditional approaches for evaluating the angle of repose involve multiple instruments and manual calculations, making the process time-consuming and prone to inconsistencies. This study aims to develop a digital sensor-based device integrated with image processing software to overcome the limitations of conventional manual and semi-automated methods.

Method

The proposed device automates the calculation of the angle of repose by combining controlled powder dispensing with digital imaging and software-based analysis. The system is designed to be compact, portable, and operable in remote or resource-limited environments. Validation was carried out using common pharmaceutical excipients with varied flow characteristics [1–4]. (M, 2005) (M, 2005).

Result

The digital apparatus demonstrated improved precision and repeatability in measuring the angle of repose compared to traditional methods, providing automated and consistent evaluation of powder flow properties.

Conclusion

The developed system simplifies the evaluation of powder flowability by automating measurements and calculations, enhancing accuracy, and enabling use in environments lacking fully equipped laboratories, thus offering a practical solution for pharmaceutical process control.