... ISO9001 Wire:Pt-Rh/Wre Head:604/602 Type High accuracy,rapid reaction,stability Mini fast ... different thermocoupe wire,thermocouple has four type are S,R,Band WRe Type. Type Model +leg -leg R QR ... thermocouple head can be divide in 602 type and 604 type. Type Model 602(Round bottom) QR-KR/S ... the different thermocouple wire tolerance,It have two type are common thermocouple wire(P) and exact thermocouple ...