Journal of Sensors and Sensor Systems
Journal of Sensors and Sensor Systems
JSSS
Articles | Volume 6, issue 2
Articles | Volume 6, issue 2
https://doi.org/10.5194/jsss-6-351-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Special issue:
https://doi.org/10.5194/jsss-6-351-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 6, issue 2
Regular research article
 | 
16 Oct 2017
Regular research article |  | 16 Oct 2017

Transmitted light pH optode for small sample volumes

Christian Rogge, Steffen Zinn, Paolo Prosposito, Roberto Francini, and Andreas H. Foitzik

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Short summary
This work presents a cost-effective optical-based sensor for pH monitoring of sample volumes less than 150 µL. As part of a bigger project to develop a stand-alone micro bioreactor system, measurements carried out with phenol red and DMEM reported a standard error of calibration in the physiologic pH range (6.5–7.5) of pH ±0.04. Compared to other accessible optical-based sensors this reported system is a good alternative regarding the overall costs of less than EUR 50.
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Special issue
Sensors and Measurement Systems 2016