A Platinum Coating Method of a Tungsten Wire to Use for Hot-Wire Anemometry

Abstract

This note describes a platinum coating method of a tungsten wire for hot-wire anemometry. The resistance deviation of the coated tungsten wire stayed within ±2% during a half year. Using sensors with the coated tungsten wire, we obtained expected results of turbulent intensities and spectra in the turbulent boundary layer. This platinum coating method makes the tungsten wire sensor stable.