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Related Experiment Videos

A thermistor leaf thermometer.

E T Linacre1, W J Harris

  • 1Commonwealth Scientific and Industrial Research Organization, Division of Irrigation Research, Griffith, N.S.W., 2680, Australia.

Plant Physiology
|August 1, 1970
PubMed
Summary
This summary is machine-generated.

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A new thermistor thermometer accurately measures leaf temperature within 0.3°C. This instrument offers superior precision compared to traditional thermocouple methods for plant science research.

Area of Science:

  • Plant physiology
  • Instrumentation
  • Temperature measurement

Background:

  • Accurate leaf temperature measurement is crucial for understanding plant physiological processes.
  • Existing methods, such as thermocouples, may lack the required precision or mimicry of leaf surface properties.

Purpose of the Study:

  • To describe a novel instrument for precise leaf temperature measurements.
  • To evaluate the performance of the new instrument against existing technologies.

Main Methods:

  • Development of a thermistor-based thermometer with a specialized probe.
  • Integration of a circuit box with a battery-powered amplifier and standard ammeter.
  • Calibration using controlled experiments comparing the thermistor probe to a thermocouple on a resilient surface.

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Main Results:

  • The instrument achieves leaf temperature measurements with an accuracy of approximately 0.3°C.
  • The thermistor thermometer demonstrated superior performance compared to a thermocouple.
  • The device features adjustable temperature ranges in 10°C steps for flexibility.

Conclusions:

  • The developed thermistor thermometer is a precise and reliable tool for leaf temperature measurements.
  • This instrument offers an advancement over conventional methods in plant science.
  • The design facilitates practical application in field and laboratory settings.