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Platinum-Rhodium Fine Diameter Bare Thermocouple Wire

Uninsulated, Fine Gage, Platinum-Rhodium Thermocouple Wire, Single Leg and Matched Pairs

$52.14

Item# SPPL-025

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-29 $52.14
30-74 $49.53
75-149 $48.49
150-299 $46.40
300-1499 $45.36
1500+ $44.32

In stock

Lead Time (If not in stock): 6 weeks
Uninsulated, Fine Gage, Platinum-Rhodium Thermocouple Wire, Single Leg and Matched Pairs SPPL-025 SPPL-025
  • Ordering unit of measure is double inch, which is 25mm (1') of positive and 25mm (1') of matching negative wire
  • Available as Single Legs and as Matched Wire Pairs
  • Type R and S Temperature Ranges from 1398 to 1482°C (2550 to 2700°F)
  • Type B is rated for continuous use up to 1704°C (3100°F)

SPPL-025 Model Options

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Edit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.

*Highlighted options are not compatible. Please select a different combination.

Thermocouple Type
Process Temperature Range
Wire Gauge
Matched Pair
Category
Wire Type
Cable Length
Additional Feature


  • Use With Sensor Type Thermocouple
For high resistance to oxidation and corrosion at high temperatures, OMEGA offers the highest quality uninsulated wire for three types of “noble metal” thermocouples.
They are:

Type S:
Platinum (–) vs.
Platinum 10% Rhodium (+)

Type R:
Platinum (–) vs.
Platinum 13% Rhodium (+)

Type B:
Platinum 6% Rhodium (–) vs.
Platinum 30% Rhodium (+)

Types R and S are recommended for continuous use in oxidizing or inert atmospheres up to 2550°F (1398°C) or short term exposures to 2700°F (1482°C). Type B is rated for continuous use up to 3100°F (1704°C) in oxidizing or inert atmospheres. When operating near these maximum temperatures, the heavier gage wire sizes are recommended.

All three thermocouple types can be used in a vacuum for short periods of time. Type B offers greater stability in such applications. None should be used in reducing atmospheres or in atmospheres containing metallic or non-metallic vapors unless protected by non-metallic protection tubes. Do not insert directly into metallic protection tubes.

Sizes range from 0.001 to 0.032" (0.025 to 0.812 mm) diameter. When requested, wire is supplied in matched pairs which meet or exceed standard limits of error. Special-limits-of-error wire is supplied on request and must be ordered as matched pairs.BR>
Insulated duplex extension grade wire for types R, S, and B are also available. See, for example, model numbers EXGG-RS, EXTT-RS, EXPP-RS under the heading EXTENSION WIRE.

Uninsulated Noble Metal Thermocouple Wire
Material Nom.
Wire Dia.
mm (")
Model No. Material Nom.
Wire Dia.
mm (")
Model No.
Platinum
(RN, SN)
0.03 (0.001)
0.05 (0.002)
0.08 (0.003)
0.13 (0.005)
0.20 (0.008)
0.25 (0.010)
0.38 (0.015)
0.51 (0.020)
0.64 (0.025)
0.81 (0.032)
SPPL-001
SPPL-002
SPPL-003
SPPL-005
SPPL-008
SPPL-010
SPPL-015
SPPL-020
SPPL-025
SPPL-032
Platinum
13% Rh
(RP)
0.03 (0.001)
0.05 (0.002)
0.08 (0.003)
0.13 (0.005)
0.20 (0.008)
0.25 (0.010)
0.38 (0.015)
0.51 (0.020)
0.64 (0.025)
0.81 (0.032)
SP13RH-001
SP13RH-002
SP13RH-003
SP13RH-005
SP13RH-008
SP13RH-010
SP13RH-015
SP13RH-020
SP13RH-025
SP13RH-032
Platinum
10% Rh
(SP)
0.03 (0.001)
0.05 (0.002)
0.08 (0.003)
0.13 (0.005)
0.20 (0.008)
0.25 (0.010)
0.38 (0.015)
0.51 (0.020)
0.64 (0.025)
0.81 (0.032)
SP10RH-001
SP10RH-002
SP10RH-003
SP10RH-005
SP10RH-008
SP10RH-010
SP10RH-015
SP10RH-020
SP10RH-025
SP10RH-032
Platinum
6% Rh
(BN)
0.20 (0.008)
0.25 (0.010)
0.38 (0.015)
0.51 (0.020)
0.81 (0.032)
SP6RH-008
SP6RH-010
SP6RH-015
SP6RH-020
SP6RH-032
Platinum
30% Rh
(BP)
0.20 (0.008)
0.25 (0.010)
0.38 (0.015)
0.51 (0.020)
0.81 (0.032)
SP30RH-008
SP30RH-010
SP30RH-015
SP30RH-020
SP30RH-032
Note: Metric dimensions are approximate

Insulated Duplex Extension Grade Wire*
Thermocouple
Material
Used With Model
AWG
Temp.
Number
Maximum
°C °F
Cu-Alloy 11 R&S 24
24
20
EXTT-RS-24
EXGG-RS-24
EXTT-RS-20
200
200
200
392
392
392
Cu-Cu B 26
24
20
EXTT-B-26S
EXPP-B-24S
EXGG-B-20
100
100
100
212
212
212
* Also see duplex wire on pages H-25 through H-33
Note: Published price is based on market value at time of printing and is subject to change due to precious metal market fluctuations.


Uninsulated Matched Pair Noble Metal Thermocouple Wire
T/C
Type
Material Wire Dia.
mm (inch)
Model No.
R Platinum
vs
Platinum-13%
Rhodium
0.03 (0.001)
0.05 (0.002)
0.08 (0.003)
0.13 (0.005)
0.20 (0.008)
0.25 (0.010)
0.38 (0.015)
0.51 (0.020)
0.64 (0.025)
0.81 (0.032)
SP13R-001
SP13R-002
SP13R-003
SP13R-005
SP13R-008
SP13R-010
SP13R-015
SP13R-020
SP13R-025
SP13R-032
S Platinum
vs
Platinum-10%
Rhodium
0.03 (0.001)
0.05 (0.002)
0.08 (0.003)
0.13 (0.005)
0.20 (0.008)
0.25 (0.010)
0.38 (0.015)
0.51 (0.020)
0.64 (0.025)
0.81 (0.032)
SP10R-001
SP10R-002
SP10R-003
SP10R-005
SP10R-008
SP10R-010
SP10R-015
SP10R-020
SP10R-025
SP10R-032
B Platinum-6%
Rhodium
vs
Platinum-30%
Rhodium
0.20 (0.008)
0.25 (0.010)
0.38 (0.015)
0.51 (0.020)
0.81 (0.032)
SP30R-008
SP30R-010
SP30R-015
SP30R-020
SP30R-032
* Ordering Unit of Measure is double inch. A double inch is 25 mm (1") of positive and 25 mm (1") of matching negative wire.
Note: Published price is based on market value at time of printing and is subject to change due to precious metal market fluctuations.
Note: Metric dimensions are approximate


View the Thermocouple Accuracy and Color Code charts
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Rated 3 out of 5 by from Good thermocouple Good product. Make sure you order this very far in advance of when you need it. And don't bother paying for fast shipping, I ordered with 3 day shipping and it took over a month to arrive.
Date published: 2017-04-16
Rated 3 out of 5 by from make sure you know what you are getting This is two separate spools of TC wire that need to be welded togeather to make a thermocouple. This is not a bare thermocouple that just needs insulation and connection to a barrier strip or connector.
Date published: 2017-01-10
Rated 5 out of 5 by from Flame Temperature This product was an excellent bought and works perfectly with my experiment, I am diagnosticating flame temperatures.
Date published: 2018-08-02
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loading all QA

Is 32 awg type B wire suitable for temperatures at 1500°C + or - 50°C continuously? If not what is the minimum wire gauge you would recommend for that temperature range?

Asked by: Sig_
Omega sells .032" diameter which is 20 AWG which would be good to 1700C as well as 24 AWG. Type B is good for the high temperatures but the -50C could be problematic because many instruments do not actually start reading until the Thermocouple sees several hundred degrees.
Answered by: ApplicationEngineerANB
Date published: 2021-06-16

This is $4.38 per 1 roll of 50 inches?

Asked by: Jenny
Hi, thanks for your question. The price is per inch. $4.38/inch. If there is anything further we can help with, please let us know.
Answered by: Jane
Date published: 2019-06-26

For Part number SP30R-010 how many feet of wire is on the spool

Asked by: Danny35
Thank you for your inquiry. The SP30R-010 is sold by inch. For a quantity of 1, you would get 1" of positive and negative conductor wire.
Answered by: Application Engineer MC
Date published: 2024-10-05

The price above shows $56.49 for each of SP30R-020. Please clarify if this price is per roll or per inch? If it is per roll, what will be the length of the roll.

Asked by: JN18
That price would be per inch. As stated in the Data Sheet in fine print: "Ordering unit of measure is double inch. A double inch is 25 mm (1") of positive and 25 mm (1") of matching negative wire."
Answered by: AndyA
Date published: 2020-11-30
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