Thermocouple wires' emf has excellent stability&accuracy. The emf is linear with temperature, our company produce all type of thermocouple wires for measuring temperature from -270 c ~ 1700 c Type E (Ni-10Cr/Cu-45Ni ) Temperature range: -200 c ~ 900 c Class:1 Tolerance limit: -40 ~ 800 +/- 1.5 c or +/- 0.4% * t Class:2 Tolerance limit: -40 ~ 900 +/- 2.5 c or +/- 0.75% * t We can produce from minimum diam 0.10mm. Our products standard conform to IEC 584-1,2, or ASTM E230