... -NiSi, NiCr-Konstantan, Fe-Konstantan, Cu-Konstantan2). Core number: 2, 4 or 6 cores3). Sheath material: SS321(SS304), SS316, SS310 ... provide outer protection tube as follows:1.A-304 or321; 2.B-GH3030; 3.C-GH3039; 4.IN-INCONEL600; 5 ... to 350°C,the tolerance is± 0.004•|t|;2.Class II: for temperature range:-40°C to 150°C,the ... range:-67°C to 40°C,the tolerance is ±2.5°C; for temperature range:-120°C to -67 ...