|
Thermocouple Material
| Material |
Best Operational Range |
Good for... |
Not Recommended for... |
| J, Iron/ Constantan |
+32 to +1400ºF |
Vacuum, reducing, or inert apps |
Oxidizing or humid environments |
| K |
-100 to +2300ºF |
Oxidizing or neutral applications |
Use under 1000º |
| E |
+32 to +1600ºF |
Oxidizing or inert applications |
|
| T, Copper/ Constantan |
-300 to +700ºF |
Oxidizing, reducing or inert apps |
Wet or humid environments |
| R, Plt 13% Rh /Plt |
+1000 to 3000ºF |
High temperatures |
Shock or vibrating equipment |
| S, Plt 10% Rh/ Plt |
+1000 to 3000ºF |
High temperatures |
Shock or vibrating equipment |
| B, Plt 30% Rh/ Ptl 6% Rh |
+1600 to 3100ºF |
High temperatures |
|
| N, NiChroSil/ NiSil |
+32 to 2300ºF |
Similar to Type K |
|
| C, W 5% Re/ W 26% Re |
+1000 to 4200ºF |
Inert or vacuum applications |
|
| M, Ni 18% Mo/ Ni |
-50 to +2500ºF |
Inert, vacuum or hydrogen apps |
Constant cycling of temperature |
Tubing, Sheath, Protection Tube, and Thermowell Materials
| Material |
Best Operational Range |
Good for... |
Not Recommended for... |
| 304 Stainless Steel |
-300 to 1650ºF |
Oxidizing or neutral applications |
|
| 316 Stainless Steel |
-300 to 1700ºF |
Oxidizing or neutral applications |
|
| Inconel 600 |
+32 to 1900ºF |
Oxidizing or reducing apps |
Sulfurous environments > 1000ºF |
| Inconel 601 |
+32 to 2300ºF |
Oxidizing or reducing apps |
|
| Wrought Iron |
+32 to 1200ºF |
Oxidizing or reducing apps |
|
| Cast Iron |
+32 to 1300ºF |
Oxidizing or reducing apps |
|
| Seamless Steel |
+32 to 1000ºF |
Oxidizing or reducing apps |
|
| Mullite (63% Alumina) |
+32 to 2700ºF |
High temperatures |
Mechanical shock |
| Alumina (>99% Al2O3) |
+32 to 3400ºF |
Induction melting, vacuum |
Mechanical or thermal shock |
| Silicon Carbide |
+32 to 3000ºF |
Secondary protection tube |
|
Wire, tubing insulation
| Material |
Best Operational Range |
Good for... |
Not Recommended for... |
| Fiberglass Braid |
-100 to 800ºF |
General purpose use |
Damp or wet areas |
| PVC |
+32 to 250ºF |
Extension wiring |
High temperature areas |
| Teflon |
-50 to 500ºF |
Wet or corrosive areas |
High temperature areas |
| Magnesium Oxide (MgO) |
-100 to +2100ºF |
high temperatures, rugged environments |
|
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