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A Rapidly Equilibrating Thermocouple Contact Thermometer for Measurement of Leaf‐Surface Temperatures
Author(s) -
Gale J.,
Manes A.,
Poljakoff-Mayber Alexandra
Publication year - 1970
Publication title -
ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.144
H-Index - 294
eISSN - 1939-9170
pISSN - 0012-9658
DOI - 10.2307/1935390
Subject(s) - thermocouple , thermometer , infrared thermometer , spring (device) , materials science , temperature measurement , infrared , optics , composite material , thermodynamics , physics
The iron—constantan thermocouple contact thermometer here described is mounted on spring clamp and can be quickly attached to the leaf; a large number of determinations can be made in a short time. The thermocouple junction equilibrates very rapidly (1.5 sec), has a low heat capacity, and is spring loaded. The performance of the contact thermometer compares well with that of a thermocouple inserted within the leaf mesohyll and with measurements made with an infrared radiation thermometer.