Mineral insulated sheat-thermocouples

Response times (guide values) of mineral insulated thermocouples (in secs.)
Measuring
conditions
Time
interval
insulated hot junction
bonded hot junction
sheat-Ø in mm
sheat-Ø in mm
0,50
1,00
1,50
3,00
0,50
1,00
1,50
3,00
Air
v = 2 m/s
0,5
1,80
3,00
8,00
23,0
1,80
3,00
8,00
23,0
0,9
5,52
10,0
25,0
80,0
5,52
10,0
25,0
80,0
Water
v = 2 m/s
0,5
0,06
0,15
0,21
1,20
0,03
0,06
0,13
0,22
0,9
0,13
0,50
0,60
2,90
0,10
0,18
0,40
0,75
The 0,5/0,9 – time interval is the time, a thermocouple needs, to indicate 50 % or 90 % of the difference of a temperature change of a medium.
(mineral insulated thermocouple with  0,25 mm and time = 0,5 has a response time of 7 ms in water)

 

Minimum depth of immersion on a mineral insulated thermocouples
Medium
Depth of immersion
Solids ( e.g. metal)
7 x the outside-diameter
Liquid materials (e.g water, oil)
7 x the outside-diameter
Gas (air)
10 x the outside-diameter

 

Sheat-material and his measurements (statements in mm)

Outer sheat
diameter

Tolerance

Wire-strength (thigh)

Distance of thigh

Wall thickness
of the heath
0,50
+/- 0,05
0,075
0,025
0,06
0,75
+/- 0,05
0,113
0,038
0,09
1,00
+/- 0,05
0,150
0,050
0,12
1,50
+/- 0,05
0,225
0,075
0,18
2,00
+/- 0,05
0,300
0,100
0,24
3,00
+/- 0,05
0,450
0,150
0,36

 

Code letter
IEC 584-3
IEC 584-3 mod.
DIN 43722
DIN 43710**
DIN 43714***
ANSI MC96.1
J*
te-blau-rot-blau
te-schwarz-weiss-rot
K
te-gruen-gruen-weiss
te-gruen-rot-gruen
te-gelb-gelb-rot
T*
te-braun-rot-braun
te-blau-blau-rot
E
 
te-pink-pink-rot
S/R
te-orange-orange-weiss
te-weiss-rot-weiss
te-gruen-schwarz-rot
N
te-rosa-rosa-weiss
 
te-orange-orange-rot
B
te-grau-grau-weiss
 
te-grau-grau-rot

* according Type L and U reffered to DIN 43710.

** DIN 43710 retired since 07/1997.
*** DIN 43714 retired since 03/2000.

 

 

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