Thermocouple Insulators
ORX
/ TRX / FRX
Tolerances
The diameter and "out of roundness" of NEWPORT's
insulators is plus or minus 3% or ±0.005", whichever
is greater. The straightness is at least 1/32 inch for
each six-inch length. The following table lists the
maximum recommended wire diameters which should be used
with six-inch sections. Closer tolerances are permissible
with shorter sections, but the minimum clearance tolerance
is ±5% or 0.005 inch, whichever is greater. |
|
OMEGATITE®
450
This is an impervious, recrystallized, pure alumina
ceramic containing over 99.8% Al2O3.
It has the most superior gas and vacuum tightness and electrical
insulating properties at elevated temperatures. It is non-reactive
and recommended for use with platinum, as well as tungsten and
molybdenum thermocouple alloys. The maximum service temperature
is 1900°C (3450°F).
OMEGATITE® 350
This is an impervious, recrystallized pure alumina
ceramic containing over 99% Al2O3.
It has superior gas and vacuum tightness and electrical
insulating properties at elevated temperatures. It
is non-reactive and compatible with tungsten and molybdenum
thermocouple alloys. The maximum service temperature is 1900°C
(3450°F). Assortment of Newport's miniature insulators showing
relative size. Sizes up to 1/4 inch O.D. are available from
stock. Call Custom Engineering for Pricing of Specific Tolerance
Insulators.
OMEGATITE® 200
This
material is recommended for most thermocouple applications.
It consists of a mullite type ceramic capable of withstanding
temperatures up to 1650°C (3000°F).
|
Bore Diameter
|
1/8"
|
3/32"
|
5/64"
|
1/16"
|
3/64"
|
1/32"
|
0.020
|
1/64"
|
0.005
|
|
Maximum
Wire Dia.
|
0.102"
|
0.064"
|
0.064"
|
0.040"
|
0.032"
|
0.020"
|
0.012"
|
0.008"
|
0.001"
|
Typical
Chemical Analysis
| |
Al2O3
|
SiO2
|
MgO
|
Na2O
|
Ca
|
Fe2O3
|
Cr2O3
|
TiO2
|
MnO
|
ZrO2
|
K2O
|
|
OMEGATITE® 450
|
99.8
|
.070
|
.050
|
.005
|
.030
|
.025
|
<.003
|
.004
|
.001
|
-
|
-
|
|
OMEGATITE® 350
|
99.0
|
.7
|
.07
|
.05
|
.030
|
.07
|
-
|
-
|
-
|
-
|
-
|
|
OMEGATITE® 200
|
55.4
|
42.0
|
.04
|
.5
|
.1
|
.8
|
-
|
.5
|
-
|
-
|
-
|
Note:
All
properties are average for test specimens. Tests were performed
according to ASTM specifications.
|
Typical
Physical Properties
|
Properties
|
OMEGATITE®
450
|
OMEGATITE®
350
|
OMEGATITE®
200
|
|
Constitution
|
99.8%
Al2O3
|
99%
Al2O3
|
80%
Mullite
20% Glass
|
|
Water
Absorption
|
0.00
|
0.00
|
0.00
|
|
Specific
Gravity
|
3.85
|
2.8
|
2.4
|
|
Gas
Permeability
|
Gas
Tight
|
Gas
Tight
|
Gas
Tight
|
|
Compressive
Strength (psi)
|
300,000
|
300,000
|
100,000
|
| Tensile
Strength (psi) |
30,000
|
30,000
|
14,00
|
|
Transverse
Strength (psi)
|
55,000
|
55,000
|
20,00
|
|
Coefficient
of Linear Thermal Expansion
|
|
24 to 250°C (75 to 480°F)
24 to 500°C (75 to 930°F)
24 to 1000°C (75 to 1830°F)
24 to 1500°C (75 to 2730°F)
|
6.2
x 10-6
7.4 x 10-6
8.5 x 10-6
9.8 x 10-6
|
3.3
x 10-6
4.0 x 10-6
5.0 x 10-6
-
|
-
-
-
-
|
|
Approximate
Thermal Conductivity (BTU/ft2/hr/°F/in)
|
|
24°C (75°F)
100°C (1470°F)
|
230
60
|
210
50
|
16
-
|
|
Max.
Service Temperature
|
1950°C
(3540°C)
|
1900° (3180°F)
|
1650°C (3000°F)
|
|
Dielectric Constant (1MC)
|
9.29
|
8.61
|
4.95
|
|
Dielectric Strength (volts/mil)
|
230
|
250
|
250
|
|
Volume Resistivity (ohm cm)
|
1013
|
1013
|
-
|
|
Te Value
|
800°C
|
1100°C
|
-
|
|
Hardness (Mohs Scale)
|
9
|
9
|
7
|
|
Fabrication Methods
|
Cast or Extrusion
|
Cast or Extrusion
|
Extrusion
|
|
 |
WIDE
RANGE OF SIZES AVAILABLE
NEWPORT® thermocouple insulators are supplied in a wide
range of sizes. Sizes up to 1/4 inch OD are available from
stock. Other sizes and lengths by quotation.
IMPORTANT
ORDERING NOTES
LENGTHS:
Prices quoted are for standard six (6) inch length ceramics.
Other sizes and styles are available on special order.
SPECIAL SIZES OR SHAPES: Orders for special sizes,
shapes and tolerances should be explicit and accompanied by
a sketch or print. Single hole ceramics with closed end are
available. Consult Sales Department.
Special lengths and metric dimensions available. Consult
Sales for details.
SINGLE
HOLE ROUND INSULATORS
Outside Diameter
(Inches) |
Inside Diameter
(Inches) |
OMEGATITE® 450
Model No. |
OMEGATITE® 350
Model No. |
OMEGATITE® 200
Model No. |
| 1/4 |
1/8 |
ORX-1814 |
ORA-1814 |
ORM-1814 |
| 1/4 |
3/32 |
ORX-33214 |
ORA-33214 |
ORM-33214 |
| 1/4 |
1/16 |
ORX-11614 |
ORA-11614 |
ORM-11614 |
| 3/16 |
3/32 |
ORX-332316 |
ORA-332316 |
ORM-332316 |
| 3/16 |
1/16 |
ORX-116316 |
ORA-116316 |
ORM-116316 |
| 1/8 |
1/16 |
ORX-11618 |
ORA-11618 |
ORM-11618 |
| 1/16 |
1/32 |
ORX-132116 |
ORA-132116 |
ORM-132116 |
| 1/32 |
0.02 |
ORX-020132 |
ORA-020132 |
ORM-020132 |
TWO
HOLE ROUND INSULATORS
Outside Diameter
(Inches) |
Inside Diameter
(Inches) |
OMEGATITE® 450
Model No. |
OMEGATITE® 350
Model No. |
OMEGATITE® 200
Model No. |
| 1/4 |
5/64 |
TRX-56414 |
TRA-56414 |
TRM-56414 |
| 1/4 |
1/16 |
TRX-11614 |
TRA-11614 |
TRM-11614 |
| 3/16 |
1/16 |
TRX-116316 |
TRA-116316 |
TRM-116316 |
| 1/8 |
0.040 |
TRX-04018 |
TRA-04018 |
TRM-04018 |
| 1/8 |
1/32 |
TRX-13218 |
TRA-13218 |
TRM-13218 |
| 1/8 |
0.020 |
TRX-02018 |
TRA-02018 |
TRM-02018 |
| 1/16 |
1/64 |
TRX-164116 |
TRA-164116 |
TRM-164116 |
| 3/64 |
0.010 |
TRX-010364 |
TRA-010364 |
TRM-010364 |
| 1/32 |
0.005 |
TRX-005132 |
TRA-005132 |
TRM-005132 |
FOUR
HOLE ROUND INSULATORS
Outside Diameter
(Inches) |
Inside Diameter
(Inches) |
OMEGATITE® 450
Model No. |
OMEGATITE® 350
Model No. |
OMEGATITE® 200
Model No. |
| 1/4 |
1/16 |
FRX-11614 |
FRA-11614 |
FRM-11614 |
| 3/16 |
3/64 |
FRX-364316 |
FRA-364316 |
FRM-364316 |
| 3/16 |
1/32 |
FRX-132316 |
FRA-132316 |
FRM-132316 |
| 1/8 |
0.020 |
FRX-02018 |
FRA-02018 |
FRM-02018 |
| 1/16 |
1/64 |
FRX-164116 |
FRA-164116 |
FRM-164116 |
| 1/32 |
0.005 |
FRX-005132 |
FRA-005132 |
FRM-005132 |
*All
stock are six inches in length. Other sizes, styles and lengths
by quotation. |
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† All dollar amounts on this site are shown in US currency.
Note: All stock insulators are six inches in length. Other sizes, styles and lengths by quotation.
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Part Number Builder |
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Option Descriptions
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(1)
|
Model Code(see part number tables above)
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| |
Select
ORX for OMEGATITE® 450 / Single Hole
ORA for OMEGATITE® 350 / Single Hole
ORM for OMEGATITE® 200 / Single Hole
TRX for OMEGATITE® 450 / 2 Hole
TRA for OMEGATITE® 350 / 2 Hole
TRM for OMEGATITE® 200 / 2 Hole
FRX for OMEGATITE® 450 / 4 Hole
FRA for OMEGATITE® 350 / 4 Hole
FRM for OMEGATITE® 200 / 4 Hole
|
(2)
|
Dimension
|
| |
Select
1814 for 1/8 in. Inside Dia. 1/4 in. Outside Dia.
33214 for 3/32 in. Inside Dia. 1/4 in. Outside Dia.
11614 for 1/16 in. Inside Dia. 1/4 in. Outside Dia.
332316 for 3/32 in. Inside Dia. 3/16 in. Outside Dia.
116316 for 1/16 in. Inside Dia. 3/16 Outside Dia. in.
11618 for 1/16 in. Inside Dia. 1/8 in. Outside Dia.
132116 for 1/32 in. Inside Dia. 1/16 in. Outside Dia.
020132 for 0.02 in. Inside Dia. 1/32 in. Outside Dia.
56414 for 5/64 in. Inside Dia. 1/4 in. Outside Dia.
04018 for 0.04 in. Inside Dia. 1/8 in. Outside Dia.
13218 for 1/32 in. Inside Dia. 1/8 in. Outside Dia.
02018 for 0.02 in. Inside Dia. 1/8 in. Outside Dia.
164116 for 1/64 in. Inside Dia. 1/16 in. Outside Dia.
010364 for 0.01 in. Inside Dia. 3/64 in. Outside Dia.
005132 for 0.005 in. Inside Dia. 1/32 in. Outside Dia.
364316 for 3/64 in. Inside Dia. 3/16 in. Outside Dia.
132316 for 1/32 in. Inside Dia. 3/16 in. Outside Dia.
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(3)
|
Length
|
| |
Select
6 for 6 inches (5pk)
12 for 12 inches (5pk)
18 for 18 inches (indiv)
24 for 24 inches (indiv)
36 for 36 inches (indiv)
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| NOTE: All combinations may not be valid, check spec sheet for valid part numbers. |
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