Mineral Insulated Thermocouple Cable

Mineral insulated thermocouple cables have inner conductors of Thermocouple base material as per standard ASTM E 585/585M and ASTM E 839.

MI Thermocouple

Number of Pair

Sheath
Diameter
(mm)
Nominal
Wall
Thickness
(mm)
Element
Diameter
(mm)
Insulation
Thickness
(mm)
Insulation
Resistance
(MΏ)
Sheath
Material
Conductor
Type
Insulation Calibration
Accuracy
Simplex 1.50 ≥ 0.15 ≥ 0.23    ≥ 0.11 ≥ 1000 MΏ

SS316L

SS321

SS310

SS446

SS304

Inconel 600

Inconel 601

and others

K Type

J Type

E Type

N Type

R Type

S Type

MgO
(Standard
Purity ≥
97%)


MgO
(High Purity
≥99.4%)

Class
1/Class 2
Accuracy
as per IEC
584-2/ANSI
MC
96.1/ASTM
E 230
2.00  ≥ 0.20 ≥ 0.30  ≥ 0.14
2.50 ≥ 0.25 ≥ 0.38 ≥ 0.18
3.00 ≥ 0.30 ≥ 0.45 ≥ 0.21
4.50 ≥ 0.45 ≥ 0.68 ≥ 0.32
6.00 ≥ 0.60 ≥ 0.90 ≥ 0.42
6.40 ≥ 0.64 ≥ 0.96 ≥ 0.45
8.00 ≥ 0.80 ≥ 1.20 ≥ 0.56
9.50 ≥ 0.95 ≥ 1.43 ≥ 0.67
10.00 ≥ 1.00 ≥ 1.50 ≥ 0.70
12.70 ≥ 1.27 ≥ 1.91 ≥ 0.70
Duplex 1.50 ≥ 0.15 ≥ 0.18 ≥ 0.08 ≥ 1000 MΏ

SS316L

SS321

SS310

SS446

SS304

Inconel 600

Inconel 601

and others

K Type

J Type

E Type

N Type

R Type

S Type

MgO
(Standard
Purity ≥
97%)


MgO
(High Purity
≥99.4%)

Class
1/Class 2
Accuracy
as per IEC
584-2/ANSI
MC
96.1/ASTM
E 230
2.00 ≥ 0.20 ≥0.24 ≥ 0.11
2.50 ≥ 0.25 ≥ 0.30 ≥ 0.14
3.00 ≥ 0.30 ≥0.36 ≥ 0.17
4.50 ≥ 0.45 ≥ 0.54 ≥ 0.25
6.00 ≥ 0.60 ≥ 0.72 ≥ 0.33
6.40 ≥ 0.64 ≥ 0.77 ≥ 0.35
8.00 ≥ 0.80 ≥0.96 ≥ 0.44
9.50 ≥ 0.95 ≥ 1.14 ≥ 0.52
10.00 ≥ 1.00 ≥ 1.20 ≥0.55
12.70 ≥ 1.27 ≥ 1.52 ≥ 0.70
Triplex 3.00 ≥ 0.30 ≥ 0.27 ≥ 0.12 ≥ 1000 MΏ

SS316L

SS321

SS310

SS446

SS304

Inconel 600

Inconel 601

and others

K Type

J Type

E Type

N Type

R Type

S Type

MgO
(Standard
Purity ≥
97%)


MgO
(High Purity
≥99.4%)

Class
1/Class 2
Accuracy
as per IEC
584-2/ANSI
MC
96.1/ASTM
E 230
4.50 ≥ 0.45 ≥ 0.41 ≥ 0.18
6.00 ≥ 0.60 ≥0.54 ≥ 0.24
6.40 ≥ 0.64 ≥ 0.58 ≥ 0.26
8.00 ≥ 0.80 ≥0.72 ≥ 0.32
9.50 ≥ 0.95 ≥ 0.86 ≥ 0.38
10.00 ≥ 1.00 ≥ 0.90 ≥0.40
  12.70 ≥ 1.27 ≥1.14 ≥ 0.51          

 

Standard Deviation of Mineral Insulated Thermocouple Cable as per IEC 584-2

Type Temperature Range Tolerance for Class 1 Accuracy Tolerance for Class 2 Accuracy
K/N -40°C to +1100°C +/- 1.5°C or +/-0.004(t) +/- 2.5°C or +/-0.0075(t)
J -40°C to +750°C +/- 1.5°C or +/-0.004(t) +/- 2.5°C or +/-0.0075(t)
T -40°C to +350°C +/- 0.5°C or +/-0.004(t) +/-1.0°C or +/-0.0075(t)
N -40°C to +800°C +/- 1.5°C or +/-0.004(t) +/- 2.5°C or +/-0.0075(t)
R/S 0°C to +1600°C +/-1°C or +/-[1+0.003(t-1100)] +/- 1.5°C or +/-0.0075(t)

 

Mineral Insulated Thermocouple Cables with Precious Thermocouple:


Resistance of Precious Metal Mineral Insulated Thermocouples in different Atmosphere
Sheath Material Thermocouple Max.Operating Temperature Oxygen Nitrogen Hydrogen Carbon Chlorine Sulphur

Inconel 600 2.4816
S Type 1100°C Good Good Good Good Good Conditional
RType 1100°C Good Good Good Good Good Conditional
B Type 1100°C Good Good Good Good Good Conditional
pt10%Rh S Type 1300°C Good Good Conditional Conditional Conditional Conditional
R Type 1300°C Good Good Conditional Conditional Conditional Conditional
BType 1300°C Good Good Conditional Conditional Conditional Conditional

Ordering Example

60 R SC : 6.0 mm OD, R Type compensating Conductor, Simplex, and Copper Sheath

60 SS SC : 6.0 mm OD, S Type compensating Conductor, Duplex, and Copper Sheath