Optical pH sensors from PyroScience are based on a unique optical detection principle (REDFLASH technology) and provides a viable alternative to traditional pH measurement devices such as electrodes. The REDFLASH technology utilized red excitation light and uses the NIR emission of the new pH sensor to overcome background fluorescence of the sample which was already successfully applied for optical oxygen sensors from PyroScience. These optical pH sensors can be operated using the FireSting pro and the Pico-pH OEM module. 

Typical Applications of optical pH Sensors

  • General measurements in liquids
  • (Micro)Bioreactors
  • Aquaculture
  • Oceanography
  • Profiling in water
  • Environmental monitoring

Based on the optical measuring principle, pH measurements (like oxygen measurements) can be even performed in closed sample vials with contactless read-out through transparent glass walls, preventing potential contamination and simplifying pH monitoring without sampling. The smart pH sensor spots from PyroScience can be mounted in any glass container and read-out from the outside without direct contact to the sample.

Even more, the pH sensor spots can be combined with the optical oxygen and/or optical temperature sensor spots in the same sample vial, offering an all-in-one solution for the measurements of important parameters.

Fore pH measurements in small volumes, we offer fiber-based pH sensors with a mini sensing tip at the top of a stainless steel tubing, which can be inserted in aqueous samples in the lab.


Related Peer-Reviewed Publications

Sediment acidification and temperature increase in an artificial CO2 vent
De Beer et al. 2021, International Journal of Greenhouse Gas Control

Distribution of floating marine macro-litter in relation to oceanographic characteristics in the Russian Arctic Seas
Pogojeva et al. 2021, Marine Pollution Bulletin

Dynamic Sensor Concept Combining Electrochemical pH Manipulation and Optical Sensing of Buffer Capacity
Steininger et al. 2021, Analytical Chemistry

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