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Sensors 2013, 13(4), 5338-5346; doi:10.3390/s130405338

Open-Source Colorimeter

1
Department of Civil and Environmental Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA
2
Department of Materials Science and Engineering, Michigan Technological University Houghton, 1400 Townsend Drive, Houghton, MI 49931, USA
3
Department of Electrical and Computer Engineering, Michigan Technological University Houghton, 601 M&M Building, 1400 Townsend Drive, Houghton, MI 49931, USA
*
Author to whom correspondence should be addressed.
Received: 31 January 2013 / Revised: 11 April 2013 / Accepted: 16 April 2013 / Published: 19 April 2013
(This article belongs to the Section Chemical Sensors)
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Abstract

The high cost of what have historically been sophisticated research-related sensors and tools has limited their adoption to a relatively small group of well-funded researchers. This paper provides a methodology for applying an open-source approach to design and development of a colorimeter. A 3-D printable, open-source colorimeter utilizing only open-source hardware and software solutions and readily available discrete components is discussed and its performance compared to a commercial portable colorimeter. Performance is evaluated with commercial vials prepared for the closed reflux chemical oxygen demand (COD) method. This approach reduced the cost of reliable closed reflux COD by two orders of magnitude making it an economic alternative for the vast majority of potential users. The open-source colorimeter demonstrated good reproducibility and serves as a platform for further development and derivation of the design for other, similar purposes such as nephelometry. This approach promises unprecedented access to sophisticated instrumentation based on low-cost sensors by those most in need of it, under-developed and developing world laboratories.
Keywords: open source; open-source hardware; colorimetery; COD; Arduino; RepRap; 3-D printer; open-source sensor; chemical oxygen demand; open-source colorimeter open source; open-source hardware; colorimetery; COD; Arduino; RepRap; 3-D printer; open-source sensor; chemical oxygen demand; open-source colorimeter
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Anzalone, G.C.; Glover, A.G.; Pearce, J.M. Open-Source Colorimeter. Sensors 2013, 13, 5338-5346.

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