. 2014 Apr 28;3:209. doi: 10.1186/2193-1801-3-209
© Grases et al.; licensee Springer. 2014
This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.
Figure 1.
Images of the device (left), and pH sensor probe (right).