... TN)200-600EChromelP(EP)/ Constantan(EN)200-1600TYPE J (Iron vs Constantan) is used in vacuum, oxidizing, inert or reducing atmospheres ... recommended for longer life at these temperatures. TYPE K (CHROMEL vs ALUMEL ) is used in oxidizing, inert or dry reducing ... atmospheres. Reliable and accurate at high temperatures. TYPE T (Copper vs Constantan) is used or service in oxidizing, inert or reducing ...