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A Welding Technique for Peltier Thermocouple Psychrometers¹

ABSTRACT

A welding technique is described for making improved themocouples for use in Peltier-type thermocouple psychrometers. Junctions welded using this technique are compared with a commercial welded thermocouple and soldered thermocouples. Thermocouples produced (i) are more stable than soldered junctions, (ii) have greater range and sensitivity than available commercial welded thermocouples, and (iii) are more uniform in response than soldered junctions.

¹ This investigation was supported in part by US Western Regional Research Project W-67, and is published as Scientific Paper no. 3143, College of Agriculture, Washington State University, Pullman. Project 1462.

² US National Science Foundation Graduate Fellow, Student Research Assistant, and Professor of Soils, respectively.

Received for publication May 22, 1968. Accepted for publication July 22, 1968.