| unit type | 
            meas. range | 
            WL | 
            application | 
        
        
            | KTRD 4465 | 
            100-1200°C 
            (212-2192°F) | 
            2,1µm | 
            steel, iron, non-ferrous metal, induction heating, soldering, tempering etc. | 
        
        
            | KTRD 4475 | 
            300-1500°C 
            (572-2732°F) | 
            1,45-1,7µm | 
            steel, iron, non-ferrous metal, wires, ceramic, rolling, induction heating, brazing, etc. | 
        
        
            | KTRD 4485 | 
            600-2500°C 
            (1112-4532°F) | 
            0,85-1,1µm | 
            steel, ceramic, glass feeder, hardening, rolling, induction heating, forging, etc. |