A microcomputer-based precision impedance analyzer for measuring electrical impedance in plant tissues

Abstract

A system for electrical impedance measurement in plant tissues has been built using a Hewlett Packard Precision LCR Meter controlled by a personal computer. This system is able to measure an impedance spectrum of 40 frequency points and automatically store the measured impedance data in the computer system within 30 s. Since this system is 1–2 orders more efficient than earlier systems for measuring impedance in plant tissues, it may have wide application in plant physiology. Key words: Electrical impedance, plant tissue, personal computer