Automatic optical fibre feedback potometer for transpiration studies

Irvine, J. J., Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Keating, D. A. and Usher, M. J. (1996) Automatic optical fibre feedback potometer for transpiration studies. Measurement Science and Technology, 7 (11). pp. 1611-1618. ISSN 1361-6501 doi: 10.1088/0957-0233/7/11/010

Abstract/Summary

A new automatic feedback potometer for physiological studies of water uptake by root systems is described. A dual-optical-fibre amplitude-modulating displacement transducer of improved sensitivity is employed to detect the changes in liquid level. The merits of optimal double-cut fibres, which make full use of the critical angle and improve coupling between the emitter and the receiver, have resulted in a sensor that is 64 times more responsive than the simple emitter - detector probe. Positioning the optical fibre transducer in a narrow capillary and using feedback to control the liquid level allows continuous measurement of volumes in the nanolitre range. The optical sensor used does not need re-calibration for the different salt solutions used in such studies.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/18975
Item Type	Article
Refereed	Yes
Divisions	Life Sciences > School of Biological Sciences > Department of Bio-Engineering
Publisher	IOP Publishing
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