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CUSTOM MARLOX® THERMOCOUPLES
Thermocouple
Type
Type
T (Copper
vs Constantan)
Type T is
used for service in oxidizing, inert or reducing atmospheres or
in vacuum. It is highly resistant to corrosion from atmospheric
moisture and condensation and exhibits high stability at low temperatures;
it is the only type with limits of error guaranteed for cryogenic
temperatures.
Type J
(Iron vs Constantan)
Type J is
used protected or unprotected in vacuum, oxidizing, inert or reducing
atmospheres. Iron element oxidizes rapidly at temperatures exceeding
1000°F, and therefore heavier gauge wire is recommended for longer
life at these temperatures.
Type
E (ChromelTM vs
Constantan)
Type E may
be used protected or unprotected in oxidizing, inert or dry reducing
atmospheres, or for short periods of time under vacuum. Must be
protected from sulfurous and marginally oxidizing atmospheres.
Produces the highest EMF per degree of any standardized metallic
thermocouple.
Type
K (ChromelTM vs
Alumel)
Type K is
used protected or exposed to oxidizing, inert or dry reducing
atmospheres. Exposure to vacuum is limited to short time periods.
Must be protected from sulfurous and marginally oxidizing atmospheres.
Reliable and accurate at high temperatures. (TM
- HOSKINS MFG. CO.)
Type
N (NICROSIL vs NISIL)
Type N is
used protected or exposed to oxidizing, inert or dry reducing
atmospheres. Exposure to vacuum is limited to short time periods.
Must be protected from sulfurous atmospheres.
| Thermocouple
Wire Alloys |
Temperature
Range (°F) |
Order
Code Standard Grade |
Initial
Calibration Tolerance |
| Standard
Grade |
Special*
Grade |
Copper
(+) vs.
Constantan (-) |
-32
to +270
+270 to +660 |
1T |
±1.8°F
±0.75% |
±0.9°F
±0.4% |
Iron
(+) vs.
Constantan (-) |
32
to 530
530 to 1400 |
1J |
±4.0°F
±0.75% |
±2.0°F
±0.4% |
ChromelTM
(+) vs.
Constantan (-) |
32
to 600
600 to 1600 |
1E |
±3.0°F
±0.5% |
±4.0°F
±0.4% |
ChromelTM
(+) vs.
Alumel (-) |
32
to 530
530 to 2300 |
1K |
±4.0°F
±0.75% |
±2.0°F
±0.4% |
Nicrosil
(+) vs.
Nisil (-) |
32
to 530
530 to 2300 |
1N |
±4.0°F
±0.75% |
±2.0°F
±0.4% |
*ACCURACY
OF MARLOX THERMOCOUPLES
Marlin
products are manufactured to specifications in conformance with
Initial Calibration Tolerance of ANSI/ASTM E230. Standard grade
wire is used in manufacturing all Marlin thermocouples for temperature
above 32°F; special grade thermocouples for use at sub-zero
temperatures, and thermocouples with certified traceable calibrations
are available upon request. To order a special grade Initial
Calibration Tolerance Thermocouple use a designation; e.g.,2T,2J,2E,2K,2N.
For
more information regarding Marlox Thermocouples,
Please consult your Marlin catalog, Pages C-21 to C-44.
If
you do not have a Marlin Catalog - Click
Here!
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