Press release from Business Wire India
Source: Ocean Optics
Tuesday, December 13, 2011 10:01 AM IST (04:31 AM GMT)
Editors: General: Consumer interest, Food & drink; Business: Business services, Chemicals; Technology; Healthcare
Optical Oxygen and pH Sensors for Monitoring of Food and Fermentation Processes
Novel fibre optic chemical sensors non-intrusive, provide real-time monitoring

Mumbai, Maharashtra, India, Tuesday, December 13, 2011 — (Business Wire India) — Advances in high-performance sensor materials and optoelectronics have enabled novel optical sensors for use in applications in life sciences, pharmaceuticals, biotechnology, food and beverage processing and more. Compared with traditional electrochemical sensing techniques such as galvanic sensors, Ocean Optics ( optical sensors can be made in small and customizable form factors, allow non-intrusive measurements and do not consume the sample.

Ocean Optics’ optical O2 and pH sensors are designed for accurate, real-time, in situ measurements in various media. The proprietary sensor coating materials do not consume the sample and can be applied to substrates such as probes, self-adhesive acrylic patches and microtiter wells. Coating options are available for general lab use, food processing lines and hydrocarbon-rich environments. Depending on the application, oxygen presence or pH can be visually determined by colour change with a handheld LED, or a fluorometer can be used to make exact measurements.

The principle of operation is to trap an oxygen-sensitive fluorophore or pH indicator dye in a sol-gel host matrix that can be applied to the tip of a fibre, an adhesive membrane such as a patch or a flat substrate such as a cuvette. The indicator materials change optical properties in response to specific analytes in their immediate environment and electronics then measure the response. For oxygen, the NeoFox Phase Fluorometer measures the partial pressure of dissolved or gaseous oxygen; for pH, a miniature fibre optic spectrometer measures the colorimetric (absorbance) response of the pH dye.

Ocean Optics optical oxygen and pH patches overcome the limitations of electrochemical-based oxygen and pH sensing. Such patches can be integrated easily within a small-scale biosystem such as a bioflask used for fermentation and provide continuous, non-intrusive monitoring of key system parameters. The ability to monitor dissolved oxygen and pH in real time without perturbing a sealed environment can lead to an improved understanding of the processes in the bioreactor and help to facilitate the development of new biological products and fermentation processes.

About Ocean Optics

Headquartered in the USA, Ocean Optics ( is a leading supplier of solutions for optical sensing – fundamental methods of measuring and interpreting the interaction of light with matter. With locations in Asia and Europe, the company has sold more than 100,000 spectrometers worldwide since 1992. Ocean Optics’ extensive line of complementary technologies includes chemical sensors, analytical instrumentation, optical fibres, thin films and optics. The company is a subsidiary of Halma p.l.c.

About Halma

Halma p.l.c. ( is an international market leader in safety, health and sensor technology. A public company listed on the London Stock Exchange, it has 3,600 employees in 36 subsidiaries worldwide. Halma’s subsidiaries make products that protect lives and improve the quality of life for people through innovation in market leading products which make its customers safer, more competitive and more profitable. These subsidiaries are assisting India’s economy in areas such as manufacturing, energy, water and waste treatment, the environment, construction, transport and health.

Halma recently opened a Hub office in Mumbai. For further news about Halma in India and to subscribe to the Halma India RSS News Feed please visit our blog at:

Photo: Ocean Optics’ oxygen and pH sensors are ideal for monitoring a wide range of samples, including viscous foods such as vegetable oils, salad dressing and peanut butter

Santosh Sen, Halma India, +91 (22) 67080400/ +91 9820247680,
Damian Corbet, Halma PR Services, +44 (0)1494 789152,


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