Monthly Archive: October 2007

Oct
25

A Glimpse from the Past into the Future of Biochemical Measurement and Control

When Monsanto was making the transition to a life science company, I had the opportunity to work on fermenter measurement and control for various genetically engineered products. Important opportunities identified then such as the application of mass spectrometers, dissolved carbon dioxide probes, and inferential measurements of metabolic processes have come to fruition today opening the …

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Oct
16

Sensible Sensor Installation – Tips

This blog is the only thing between me and dinner so here are some tidy tips on tips. Sensor tips in a vessel located too close to a dip tube for pH or temperature and a sparger tube for dissolved oxygen result in a noisy measurement that may be responding more to the temperature or …

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Oct
09

Sensible Sensor Installation – Follow Up

Since readers of last week’s blog may be waiting with baited breath, I offer the following mints. Thermowells inserted into the side of a pipeline instead of an elbow may be sensing the effect of the wall or flange temperature. If the pipe wall temperature was the same as the process fluid temperature you wouldn’t …

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Oct
02

Sensible Sensor Installation

Well it is half time, and I have about 20 minutes to write something sensible about sensors for my blog while on vacation so off the top of my head I offer the following rules of thumb. The best sensitivity from a temperature or pH sensor can generally be achieved by an installation where the …

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