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  5. See J Type Thermocouple Duplex Wire
  6. FF-J-20-50
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J Type Thermocouple Duplex Wire

Thermocouple Wire Type J, Duplex Insulated
4.9
(26)
Thermocouple Wire Type J, Duplex Insulated
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Data Sheet (PDF)

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$109.32

Item# FF-J-20-50

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 $109.32
5-9 $103.85
10-24 $98.39
25-49 $92.92
50-99 $87.46
100+ $81.99

In stock

Lead Time (If not in stock): 7 weeks
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Thermocouple Wire Type J, Duplex Insulated FF-J-20-50 FF-J-20-50
  • High Quality Type "J" Thermocouple Grade Wire
  • In Stock - Available for Immediate Shipment
  • Choice of Insulation, Wire Gage, & Length

FF-J-20-50 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.

Temperature Min
Temperature Max
Temperature Range
Wire Gauge
Conductor Insulation
Conductor type
Cable Length
Additional Feature
Cable Type
Overall Insulation
Number of Pairs
Overbraiding Type
Special Limit of error
Color Code Standard
Category
Temperature Unit
Thermocouple Calibration Type


  • Color Code Standard Positive Wire: White
  • Use With Sensor Type Thermocouple

ANSI Color Code: Positive Wire, White; Negative Wire, Red; Overall, Brown

 Insulation AWG
No. 		Model
Number 		Type
Wire 		Insulation Max. Temp Nominal
Size 		Wt.†
 lb/1000'
Conductor Overall °F °C
Ceramic* 14 XC-J-14 Solid Nextel Ceramic Nextel Ceramic 1100 590 .140 x .200 38
20 XC-J-20 Solid Nextel Ceramic Nextel Ceramic 900 480 .135 x .190 16
20 XT-J-20 Solid Nextel Ceramic Nextel Ceramic 900 480 .105 x .155 15
20 XL-J-20 Solid Nextel Ceramic Nextel Ceramic 900 480 .095 x .135 14
24 XC-J-24 Solid Nextel Ceramic Nextel Ceramic 700 370 .115 x .175 12
24 XT-J-24 Solid Nextel Ceramic Nextel Ceramic 700 370 .088 x .132 11
24 XL-J-24 Solid Nextel Ceramic Nextel Ceramic 700 370 .078 x .116 10

Silica* 		14 XS-J-14 Solid Silica Silica 1100 590 .140 x .200 35
20 XS-J-20 Solid Silica Silica 900 480 .105 x .155 12
24 XS-J-24 Solid Silica Silica 700 370 .088 x .132 10
High
Temp.
Glass** 		20 HH-J-20 Solid High Temp. Glass High Temp. Glass 900 480 .060 x .105 9
24 HH-J-24 Solid High Temp. Glass High Temp. Glass 700 370 .055 x .090 5
Glass 14 GG-J-14 Solid Glass Braid Glass Braid 900 482 .100 x .160 43
20 GG-J-20 Solid Glass Braid Glass Braid 900 482 .060 x .095 9
20 GG-J-20S 7 x 28 Glass Braid Glass Braid 900 482 .060 x .100 9
24 GG-J-24 Solid Glass Braid Glass Braid 700 370 .050 x .080 5
24 GG-J-24S 7 x 32 Glass Braid Glass Braid 700 370 .050 x .085 5
28 GG-J-28 Solid Glass Wrap Glass Braid 700 370 .045 x .070 3
30 GG-J-30 Solid Glass Wrap Glass Braid 600 320 .045 x .070 3
36 GG-J-36 Solid Glass Wrap Glass Braid 600 320 .045 x .070 2
Glass with Stainless
Steel Overbraid 		20 GG-J-20-SB Solid Glass SS Braid over Glass 900 482 .090 x .120 14
20S GG-J-20S-SB 7 x 28 Glass SS Braid over Glass 900 482 .090 x .127 15
24 GG-J-24-SB Solid Glass SS Braid over Glass 900 482 .085 x .117 11
24S GG-J-24S-SB 7 x 32 Glass SS Braid over Glass 900 482 .080 x .110 11
Kapton Fused
Polymide Tape		 20 KK-J-20 Solid Fused Polymide Tape Fused Polymide Tape 500 260 .060 x .100 11
20S KK-J-20S 7 x 28 Fused Polymide Tape Fused Polymide Tape 500 260 .060 x .105 11
24 KK-J-24 Solid Fused Polymide Tape Fused Polymide Tape 500 260 .050 x .075 6
24S KK-J-24S 7 x 32 Fused Polymide Tape Fused Polymide Tape 500 260 .050 x .085 6
30 KK-J-30 Solid Fused Polymide Tape Fused Polymide Tape 500 260 .040 x .055 5
PFA
and
Glass  		30 TG-J-30 Solid PFA Glass Braid 500 260 .034 x .047 2
36 TG-J-36 Solid PFA Glass Braid 500 260 .028 x .038 2
40 TG-J-40 Solid PFA Glass Braid 500 260 .026 x .035 2

Neoflon
PFA
(HighPerformance)  		20 TT-J-20 Solid PFA PFA 500 260 .068 x .116 11
20 TT-J-20S 7 x 28 PFA PFA 500 260 .073 x .126 11
22 TT-J-22S 7 x 30 PFA PFA 500 260 .065 x .133 9
24 TT-J-24 Solid PFA PFA 500 260 .056 x .092 6
24 TT-J-24S 7 x 32 PFA PFA 500 260 .063 x .102 6
30 TT-J-30†† Solid PFA PFA 500 260 .024 x .040 2
36 TT-J-36†† Solid PFA PFA 500 260 .019 x .030 2
40 TT-J-40†† Solid PFA PFA 500 260 .017 x .026 2
PFA Polymer
w/Twisted
& Shielded Conductors		 20 TT-J-20-TWSH Solid PFA Polymer PFA Polymer and Shielding 500 260 .15 20
20S TT-J-20S-TWSH 7 x 28 PFA Polymer PFA Polymer and Shielding 500 260 .15 20
24 TT-J-24-TWSH Solid PFA Polymer PFA Polymer and Shielding 500 260 .11 9
24S TT-J-24S-TWSH 7 x 32 PFA Polymer PFA Polymer and Shielding 500 260 .12 9
Neoflon
FEP 		20 FF-J-20 Solid FEP FEP 392 200 .068 x .116 11
24 FF-J-24 Solid FEP FEP 392 200 .056 x .092 7
FEP Polymer
w/Twisted & Shielded Conductors		 20 FF-J-20-TWSH Solid FEP Polymer FEP Polymer and Shielding 392 200 .15 20
20S FF-J-20S-TWSH 7 x 28 FEP Polymer FEP Polymer and Shielding 392 200 .15 20
24 FF-J-24-TWSH Solid FEP Polymer FEP Polymer and Shielding 392 200 .11 9
24S FF-J-24S-TWSH 7 x 32 FEP Polymer FEP Polymer and Shielding 392 200 .12 9
TFE Tape Polymer 20 TFE-J-20 Solid TFE Tape Polymer Fused TFE Tape Polymer 500 260 .060 x .100 11
20S TFE-J-20S 7 x 28 TFE Tape Polymer Fused TFE Tape Polymer 500 260 .060 x .105 11
24 TFE-J-24 Solid TFE Tape Polymer Fused TFE Tape Polymer 500 260 .050 x .075 6
24S TFE-J-24S 7 x 32 TFE Tape Polymer Fused TFE Tape Polymer 500 260 .050 x .085 6
Polyvinyl  24 PR-J-24 Solid Polyvinyl (Rip Cord)*** 221 105 .050 x .086 5
24 PP-J-24S 7 x 32 Polyvinyl Polyvinyl 221 105 .080 x .130 5

*Has color tracers on jacket and conductors, XC= Max Insul Density, XT=Reduced Insul Density, XL=Minimum Insul Density-Looser Woven
**Has color tracers on jacket and positive leg only
***Two insulated leads bonded together, but with no overwrap.
†Weight of spool and wire rounded up to the next highest lb. (does not include packing material).
††Overall color clear

Rated 5 out of 5 by from EXCELLENT WIRE We buy this wire on a regular basis. Excellent quality wire for our applications.
Date published: 2016-02-02
Rated 5 out of 5 by from Order Process Order processed was wonderful. This process was simple and quick
Date published: 2024-09-16
Rated 5 out of 5 by from Great wire This wire is as accurate as it gets and easy to work with.
Date published: 2024-08-14
Rated 5 out of 5 by from OMEGA Good quality product for the price, good delivery time.
Date published: 2024-07-29
Rated 5 out of 5 by from Exactly what I needed it was exactly what I needed, it met my needs and was delivered on time.
Date published: 2024-06-03
Rated 5 out of 5 by from Thermocouple wire type J duplex Fast delivery, great product according to specifications
Date published: 2024-05-10
Rated 5 out of 5 by from Thermocouple Wire Type J The Type J Thermocouple Wire from Omega combines affordability with dependable temperature measurement. Widely available and suitable for a broad temperature range, it excels in diverse industrial applications. We use it very often with our different applications and tests among different departments in our company. Highly recommend it for your different needs.
Date published: 2023-12-14
Rated 5 out of 5 by from High Quality Thermocouple is a good replacement which is durable and dependable.
Date published: 2023-12-06
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Can you provide this type J thermocouple wire calibrated to ISO 17025?

Asked by: Hepin
Hi Hepin Thank you for the inquiry. Unfortunately we currently do not offer calibrations with ISO 17025 certification. Best regards OMEGA
Answered by: NorwalkAE_RS
Date published: 2023-09-07

What is the difference in SLE tolerance compared to non SLE?

Asked by: Roddrob
Thank you for your inquiry. Please review page 2 of this document to see the difference in SLE tolerance compared to non SLE: https://assets.omega.com/landing-pages/colorcodes/tc_colorcodes.pdf
Answered by: Application Engineer SP
Date published: 2024-02-21

Hello Omega team, I am looking a wire for thermocouple type J and K that being flexible or easy to manipulate with a range of 400 - 800 °F, the wire will be exposed in an environment of 90 °F. could you recommend me one with that characteristics?

Asked by: Anselmo
Thank you for your inquiry. You will need to purchase a thick gauge wire with the fiberglass insulation. For assistance on the exact part number, please email us at temp@dwyeromega.com or call us at 1-888-826-6342.
Answered by: NorwalkAE_SP
Date published: 2024-04-15

I have to do high temp testing inside a shipping container. Do I need to run 1 continuous thermocouple to the meter or could I run a high temp wire inside the container and connect it up to a regular thermocouple wire from there to the meter?

Asked by: Segan11
Thank you for your inquiry Segan11. Either or would work but we recommend you use a wire that is rated for the temperature inside the container.
Answered by: Application Engineer SP
Date published: 2022-10-14

If I purchase thermocouples, part number 5TC-TT-J-24-72. do they include a certification?

Asked by: Fred33
Thank you for your inquiry Fred33. The 5TC-TT-J-24-72 comes from us with a Certificate of Conformance that states that this product meets all the specs stated on the data sheet. If you need a NIST certificate of calibration, please send a quote request to sales@omega.com.
Answered by: Application Engineer MC
Date published: 2022-11-18

What is IEC standard

Asked by: J R W
Thank you for your interest in our Product . IEC will apply to the color coding of the jacket and insulation only. For Thermocouple Grade Type J for example, the color coding is a Black jacket with a (+) Black and (-) white insulation All accuracy testing of the wire is conducted in accordance with ASTM E 230 which has slightly tighter tolerances in the lower temperature ranges than the IEC 584 specification.
Answered by: SAE SAT
Date published: 2021-11-01

Is the "max temperature" listed (ex. 480C) the maximum temperature an attached thermocouple probe can measure? Or is that the maximum temperature the wire itself can be exposed to?

Asked by: J R B
Thank you for your inquiry. It is the maximum temperature the wire (along with the insulation) itself can be exposed to.
Answered by: NorwalkAE_SP
Date published: 2024-01-08

Does this come with the connectors to attach to the meter?

Asked by: laz87
Thank you for your inquiry laz87. No, this wire does not come with the connectors. The connectors are sold separately.
Answered by: Application Engineer SP
Date published: 2022-04-22
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GG-J-30-SLE-1000
Thermocouple Wire Type J, Duplex Insulated
$577.47
8 In Stock
TT-T-30-500
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$440.50
0 In Stock

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