● Standard GB/T4994-1998
● Applicable conditions:
oxidation and weak reducing, also in the vacuum and neutral atmosphere
Temperature range: 0 ~ 700 ℃
● Temperature the upper limit
Wire dia mm |
Long-term temperature the upper limit ℃ |
Short-term temperature the upper limit ℃ |
0.3 0.5 |
300 |
400 |
0.8 1.0 1.2 |
400 |
500 |
1.6 2.0 |
500 |
600 |
2.5 3.2 |
600 |
750 |
● Uneven Thermo-emf
Wire dia mm |
Temperature of measuring side ℃ |
Uneven thermo-emf μV |
|||
Ⅰ |
Ⅱ |
||||
Fe |
CuNi |
Fe |
CuNi |
||
0.3 0.5 |
300 |
10 |
45 |
20 |
75 |
0.8 1.0 1.2 |
400 |
10 |
50 |
20 |
90 |
1.6 2.0 |
500 |
15 |
60 |
25 |
115 |
2.5 3.2 |
600 |
20 |
75 |
35 |
140 |
● Thermo-emf and tolerance
Wire dia mm |
Grade |
Thermocouple thermo-emf tolerance at measuring points μv |
||
0.3 0.5 |
test temperature |
100℃ |
200℃ |
250℃ |
Ⅰ |
5269±82 |
10779±83 |
|
|
Ⅱ |
5269±136 |
10779±139 |
|
|
0.8 1.0 1.2 |
test temperature |
100℃ |
200℃ |
400℃ |
Ⅰ |
5269±82 |
10779±83 |
21848±88 |
|
Ⅱ |
5269±136 |
10779±139 |
21848±165 |
|
1.6 2.0 |
test temperature |
300℃ |
400℃ |
500℃ |
Ⅰ |
16329±83 |
21848±88 |
27393±112 |
|
Ⅱ |
16329±138 |
21848±165 |
27393±210 |
|
2.5 3.2 |
test temperature |
300℃ |
400℃ |
600℃ |
Ⅰ |
16329±83 |
21848±88 |
33102±140 |
|
Ⅱ |
16329±138 |
21848±165 |
33102±263 |
|
Online Trading: