Annealing procedures for hot-wire sensors of platinum and platinum-plated tungsten have been investigated experimentally. It was discovered that the two investigated sensor metals behave quite differently during the annealing process, but for both types annealing may improve long-term stability considerably. Measured drift of sensors both without and with prior annealing is presented. Suggestions for suitable annealing temperatures and times are given.

Topics
Electrical properties and parameters, Thermodynamic states and processes, Calibration methods, Weather forecasting, Temperature coefficient, Crystallographic defects, Crystal lattices, Electrical resistivity, Annealing, Electrochemistry
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Overheat ratio a = RW/R0 where RW and R0 are wire resistances at operating temperature and ambient temperature, respectively.

© 2015 AIP Publishing LLC.
2015
AIP Publishing LLC
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