Note: Improving long-term stability of hot-wire anemometer sensors by means of annealing.
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.
Department of Building, Energy and Environmental Engineering, University of Gävle, SE-801 76 Gävle, Sweden.
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Lundström