Look into :Ion sensitive Field Effect Transistors.and books on Biomedical
transducers.
Wen Ko
To whom it may concern:
> My name is Russell Mueller and am a Masters student in Animal
>Science at Oklahoma State University. My research project entails
>trying to develop a radiotelemetry pH sensor that will measure hind-gut
>pH in Horses feed varying pH affecting diets. We are having
>difficulties finding a sensor that will fit in a capsule about 1 inch
>long and a diamter of 3/4 of an inch. If you have any information,
>ideas, or products on the market, your help would be greatly
>appreciated. Thank you.
>Russell Mueller
>205 Poultry Science
>Oklahoma State University
>Stillwater OK 74078
>(405) 744-7783
>
>