ORX / TRX / FRX- Thermocouple Insulators

Thermocouple Insulators

ORX / TRX / FRX

Tolerances
The diameter and "out of roundness" of NEWPORT's insulators is plus or minus 3% or ±.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 .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.	.102"	.064"	.064"	.040"	.032"	.020"	.012"	.008"	.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
To Order (Specify Model No.) Prices Shown in U.S. Dollars

Dimensions		OMEGATITE^®450		OMEGATITE^®350		OMEGATITE^®200
Outside Dia.	Inside Dia.	Model No.	Price per. Pkg. of 5 (6" Lengths)	Model No.	Price per. Pkg. of 5 (6" Lengths)	Model No.	Price per. Pkg. of 5 (6" Lengths)
1/4"	1/8"	ORX-1814	$30	ORX-1814	$25	ORX-1814	$15
1/4"	3/32"	ORX-33214	$30	ORX-33214	$25	ORX-33214	$15
1/4"	1/16"	ORX-11614	$30	ORX-11614	$25	ORX-11614	$15
3/16"	3/32"	ORX-332316	$30	ORX-332316	$25	ORX-332316	$15
3/16"	1/16"	ORX-116316	$30	ORX-116316	$25	ORX-116316	$15
1/8"	1/16"	ORX-1618	$30	ORX-1618	$25	ORX-1618	$15
1/16"	1/32"	ORX-132116	$30	ORX-132116	$25	ORX-132116	$15
1/32"	.020"	ORX-020132	$45	ORX-020132	$35	ORX-020132	$25

TWO HOLE ROUND INSULATORS
To Order (Specify Model No.) Prices Shown in U.S. Dollars

Dimensions		OMEGATITE^®450		OMEGATITE^®350		OMEGATITE^®200
Outside Dia.	Inside Dia.	Model No.	Price per. Pkg. of 5 (6" Lengths)	Model No.	Price per. Pkg. of 5 (6" Lengths)	Model No.	Price per. Pkg. of 5 (6" Lengths)
1/4"	5/64"	TRX-56414	$30	TRX-56414	$25	TRX-56414	$15
1/4"	1/16"	TRX-11614	$30	TRX-11614	$25	TRX-11614	$15
3/16"	1/16"	TRX-116316	$30	TRX-116316	$25	TRX-116316	$15
1/8"	.040"	TRX-04018	$30	TRX-04018	$25	TRX-04018	$15
1/8"	1/32"	TRX-13218	$30	TRX-13218	$25	TRX-13218	$15
1/8"	.020"	TRX-02018	$30	TRX-02018	$25	TRX-02018	$15
1/16"	1/64"	TRX-164116	$30	TRX-164116	$25	TRX-164116	$15
3/64"	.010"	TRX-010364	$30	TRX-010364	$25	TRX-010364	$15
1/32	.005"	TRX-005132	$45	TRX-005132	$35	TRX-005132	$25

FOUR HOLE ROUND INSULATORS
To Order (Specify Model No.) Prices Shown in U.S. Dollars

Dimensions		OMEGATITE^® 450		OMEGATITE^® 350		OMEGATITE^®200
Outside Dia.	Inside Dia	Model No.	Price per. Pkg. of 5 (6" Lengths)	Model No.	Price per. Pkg. of 5 (6" Lengths)	Model No.	Price per. Pkg. of 5 (6" Lengths)
1/4"	1/16"	FRX-11614	$30	FRX-11614	$25	FRX-11614	$15
3/16"	3/64"	FRX-364316	$30	FRX-364316	$25	FRX-364316	$15
3/16"	1/32"	FRX-132316	$30	FRX-132316	$25	FRX-132316	$15
1/8"	.020"	FRX-02018	$30	FRX-02018	$25	FRX-02018	$15
1/16"	1/64"	FRX-164116	$45	FRX-164116	$35	FRX-164116	$25
1/32"	.005"	FRX-005132	$70	FRX-005132	$65	FRX-005132	$60

*All stock are six inches in length. Other sizes, styles and lengths by quotation.