For many years, the biotech industry has relied on polarographic technology for dissolved oxygen (DO) measurement. Handling and maintenance of polarographic sensors is well understood and such sensors can be relied on to provide accurate measurements if kept in good operating condition. However, they have some aspects which can be cumbersome for technicians and can delay operations.

Optical measurement of oxygen is a relatively recent development which is also highly accurate but additionally provides much easier handling. Here are five reasons why biotech companies are moving from polarographic to optical DO sensors.