Tungsten-rhenium thermocouples sune mafi girman thermocouples don auna zafin jiki.Shi ne yafi dace da injin, H2 da inert gas kariya yanayi, da kuma matsakaicin aiki zafin jiki iya isa 2300 ℃.Akwai ƙididdiga guda biyu, C (WRe5-WRe26) da D (WRe3-WRe25), tare da daidaito na 1.0% ko 0.5%