... radiation infrared ray with a wavelength of 3um~50um. Infrared ceramic heater tube is made from the precious metal oxides, when ... through the current, heat is emitted through the wall 3μm ~ 15μm wavelength infrared. Model Tube Dia ( ... Drying of Leather, Wood, Plywood, Printing and Dyeing Product, Paint, Ceramic Glaze, Medicine, Paper, Printed Matter, Food, Agricultural Products, Seafood. ...