radio pill

radio pill

[′rād·ē·ō ‚pil]
(electronics)
A device used in biotelemetry for monitoring the physiologic activity of an animal, such as pH values of stomach acid; an example is the Heidelberg capsule.
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References in periodicals archive ?
His on-screen career began in 1966 on Panorama with Richard Dimbleby, where he produced a radio pill that could measure pressure, temperature and acidity in the gut.