Modular electric powered vaporizers are suitable for use with industrial gases such as oxygen, nitrogen, argon, and carbon dioxide as well as other specialized gases. It utilizes high quality electric heating elements and stainless steel heat exchanger tubes. Heating elements and tubes are specially positioned in the highly conductive aluminum modules extruded especially for the purpose. Heat transfer is further enhanced in vaporizer units by means of a spirovane turbulence promoter within each stainless tube, which also reduces fluid slugging and surging.