Accessibility navigation

Automatic optical fibre feedback potometer for transpiration studies

Irvine, J. J., Hadjiloucas, S. ORCID:, 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

Full text not archived in this repository.

It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing.

To link to this item DOI: 10.1088/0957-0233/7/11/010


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
Divisions:Life Sciences > School of Biological Sciences > Department of Bio-Engineering
ID Code:18975
Publisher:IOP Publishing

University Staff: Request a correction | Centaur Editors: Update this record

Page navigation