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Product

IEC 60584-3 Type EX thermocouple cableIEC 60584-3 / ANSI MC96.1NiCr (+) / CuNi (−) True EX~68 µV/°C · Non-Magnetic

EX / Type E extension Thermocouple CableTrue NiCr / CuNi (Type E) high-EMF (~68 µV/°C) non-magnetic thermocouple cable

High-output Type EX thermocouple extension cable built to IEC 60584-3 and ANSI MC96.1 with non-magnetic Nickel-Chromium (+ NiCr) and Copper-Nickel (− CuNi) conductors delivering the highest Seebeck output (~68 µV/°C) of any standard thermocouple.

Low-EMC design
EMC screen
Flame-retardant
Oil-resistant
Order designation
EX-PVC-PiMF 4×2×1.0
Outer Ø ≈
12.8 mm
Total weight ≈
212 kg/km
Min. bend R (fixed)
96 mm
Configuration
4×2×1.0 mm² (7/0.43)
All sizes (14)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Alloy pair
NiCr (+) / CuNi
90Ni10Cr (+) / 55Cu45Ni (−)
Seebeck output
≈ 68 µV/°C
highest EMF of standard types
EMF tolerance
Class 1: ±1.5 °C
±120 µV · Class 2: ±2.5 °C
Loop resistance
≈ 1.20 Ω/m/pair
at 1.0 mm² (0.71 + 0.49 Ω/m)
IEC colour code
+ Violet / − Wh
Violet outer jacket (or Ex-i Blue)
ANSI colour code
+ Purple / − Red
Purple outer jacket (ASTM E230)

Typical values for this cable type, based on IEC 60584-3 / ANSI MC96.1 / ASTM E230 — confirmed in the datasheet and quotation for your order.

Application fit

Is EX / Type E extension right for your machine?

Engineered for Type E (NiCr-CuNi) thermocouples in power-plant gas/steam turbine exhausts, cryogenic LNG plants, high-magnetic-field environments and small-differential temperature measurements.

Fixed installation

Suitable

Supplied in PVC, XLPE/LSZH and +200 °C FEP/PTFE for turbine skids, trays and DCS marshalling cabinets.

TBM gantry & advancing tunnel reel

Suitable

SWA armoured execution (EX-XLPE-SWA) protects underground power-plant and LNG trench runs.

Offshore platform & shipboard deck trays

Suitable

Both NiCr and CuNi conductors are completely non-ferrous and rust-free in humid outdoor atmospheres.

Energy chain / drag chain

Not suitable

Static and occasional-flex thermocouple cable; not designed for continuous drag chains.

PUR Drag-Chain Control Cable
Typical machinesGas & Steam Turbine Exhaust MonitoringCryogenic Air Separation & LNG PlantsMRI, Cyclotron & High-Magnetic-Field LabsAerospace Propulsion & Thermal Test CellsChemical & Petrochemical Process Units

Construction

Layer by layer

Shown: EX-PVC-PiMF 4×2×1.0 mm² (IEC 60584-3) with 7-wire stranded NiCr (+) and CuNi (−) conductors, Violet (+) / White (−) numbered insulation, individual & collective Al/PET screens and Violet RAL 4005 outer sheath.

12345
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1True Type EX thermocouple alloy conductorsPositive (+): Nickel-Chromium (NiCr 90/10, non-magnetic) · Negative (−): Copper-Nickel (CuNi 55/45, non-magnetic), solid or 7-wire strandedCombines the positive leg of Type K with the negative leg of Type J/T for ~68 µV/°C sensitivity
2Colour-coded core insulation105 °C HR-PVC, +90 °C XLPE, or +200 °C FEP (IEC: + Violet / − White; ANSI: + Purple / − Red)High dielectric insulation prevents millivolt signal leakage
3Individual & collective Al/PET screensAluminium/PET laminated tape + 0.5 mm² tinned copper drain wire (OS or PiMF+OS)100 % electrostatic shielding
4Optional SWA or tinned copper braidUnarmoured, tinned copper wire braid, or Galvanised Steel Wire Armour (SWA)Mechanical protection for turbine skids or outdoor trenches
5Outer jacket (Violet / Purple RAL 4005 or Ex-i Blue)Flame-retardant PVC, Low-Smoke Zero-Halogen (LSZH), or fluoropolymer FEPIEC 60332-1-2 / IEC 60332-3-24 flame retardant

EX — IEC 60584-3 (Violet/White)

Positive (+) Violet, Negative (−) White, Outer Jacket Violet (RAL 4005)

EX — ANSI MC96.1 (Purple/Red)

Positive (+) Purple, Negative (−) Red, Outer Jacket Purple per ASTM E230

EX-FEP / EX-SWA

−60…+200 °C FEP fluoropolymer for turbine skids or SWA armoured for trenches

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on IEC 60584-3 / ANSI MC96.1 / ASTM E230. Values for your order are confirmed in the datasheet and quotation.

Electrical

Positive conductor (+)
Nickel-Chromium (NiCr ~90 % Ni / 10 % Cr, non-magnetic, ~70.6 µΩ·cm)
Negative conductor (−)
Copper-Nickel (CuNi ~55 % Cu / 45 % Ni, non-magnetic, ~49 µΩ·cm)
Tolerance Class 1 (IEC 60584-3)
±1.5 °C (±120 µV) over −25 °C to +200 °C junction range
Tolerance Class 2 (IEC 60584-3)
±2.5 °C (±200 µV) over −25 °C to +200 °C junction range
Nominal Seebeck coefficient
≈ 68.0 µV/°C (0 to +100 °C) · loop R ≈ 1.20 Ω/m at 1.0 mm²

Thermal

Thermoelectric calibration range
−25 °C to +200 °C (true extension grade EX)
Insulation rating (by jacket type)
−25…+105 °C (HR-PVC) · −40…+90 °C (XLPE/LSZH) · −60…+200 °C (FEP)

Mechanical

Conductor stranding
0.5 mm² (7/0.30) · 1.0 mm² (7/0.43) · 1.5 mm² (7/0.53) or solid
Min. bending radius
7.5 × OD (unarmoured) · 10 × OD (SWA armoured)

Resistance

Flame retardance
IEC 60332-1-2 & IEC 60332-3-24 Cat C
Corrosion & magnetic immunity
100 % non-ferrous, non-magnetic conductor pair

Reference standards

Thermocouple cable standard
IEC 60584-3, ANSI/ISA MC96.1 (ASTM E230) & DIN 43722
Cable construction standard
BS EN 50288-7 / BS 5308

Identification

IEC 60584-3 colour code
(+) Violet · (−) White · Outer sheath: Violet (or Blue Ex-i)
ANSI MC96.1 colour code
(+) Purple · (−) Red · Outer sheath: Purple
Customs tariff (HS)
8544.49

Sizes

14 standard EX / Type E extension thermocouple cable sizes

Single-pair and multi-pair (1P to 24P) PVC, XLPE/LSZH, FEP (+200 °C) and SWA armoured constructions.

Dimensions, construction & weights
Order designationConfigurationInsulation / SheathTemp. rangeOuter Ø ≈
mm		Weight ≈
kg/km		Min. bend R
fixed mm		Enquiry
EX Heat-Resistant PVC / PVC Screened (−25…+105 °C)
EX-PVC-OS 1×2×0.51×2×0.5 mm² (7/0.30)PVC / PVC (OS)−25…+105 °C5.64442
EX-PVC-PiMF 2×2×0.52×2×0.5 mm² (7/0.30)PVC / PVC (PiMF+OS)−25…+105 °C8.68464
EX-PVC-PiMF 4×2×0.54×2×0.5 mm² (7/0.30)PVC / PVC (PiMF+OS)−25…+105 °C10.814281
EX-PVC-PiMF 8×2×0.58×2×0.5 mm² (7/0.30)PVC / PVC (PiMF+OS)−25…+105 °C14.1246106
EX-PVC-PiMF 12×2×0.512×2×0.5 mm² (7/0.30)PVC / PVC (PiMF+OS)−25…+105 °C16.9348127
EX-PVC-OS 1×2×1.01×2×1.0 mm² (7/0.43)PVC / PVC (OS)−25…+105 °C6.76850
EX-PVC-PiMF 4×2×1.04×2×1.0 mm² (7/0.43)PVC / PVC (PiMF+OS)−25…+105 °C12.821296
EX-PVC-OS 1×2×1.51×2×1.5 mm² (7/0.53)PVC / PVC (OS)−25…+105 °C7.59256
EX-PVC-PiMF 4×2×1.54×2×1.5 mm² (7/0.53)PVC / PVC (PiMF+OS)−25…+105 °C14.3286107
EX High-Temperature FEP / FEP Screened (−60…+200 °C)
EX-FEP-OS 1×2×0.51×2×0.5 mm² (7/0.30)FEP / FEP (OS)−60…+200 °C4.63834
EX-FEP-PiMF 4×2×0.54×2×0.5 mm² (7/0.30)FEP / FEP (PiMF+OS)−60…+200 °C9.212869
EX-FEP-OS 1×2×1.01×2×1.0 mm² (7/0.43)FEP / FEP (OS)−60…+200 °C5.65842
EX XLPE / LSZH / SWA Armoured Direct-Burial (−40…+90 °C)
EX-XLPE-SWA 1×2×1.51×2×1.5 mm² (7/0.53)XLPE / SWA / LSZH−40…+90 °C12.1298121
EX-XLPE-SWA 4×2×1.54×2×1.5 mm² (7/0.53)XLPE / SWA / LSZH−40…+90 °C19.8745198
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Specify 'IEC' (+ Violet / − White) or 'ANSI' (+ Purple / − Red) colour coding when ordering.

Quality & approvals

Testing & inspection

Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.

  1. ConductorClass 5 stranding
  2. Spark test100 % in-line
  3. Lay-upCores, earth, fillers
  4. SheathingInner, braid / screen, outer
  5. Electrical testsAC voltage, resistance
  6. DimensionsOD, wall thickness
  7. Inspection documents & dispatchDrum & dispatch
Testing & inspectionTest value / referenceFrequency
Routine tests
Thermoelectric EMF calibration test (IEC 60584-3)EMF deviation within Class 1 (±1.5 °C / ±120 µV) at +100 °C / +200 °CEvery alloy batch
1500 V / 2000 V AC dielectric & continuity test1 min AC withstand test without breakdownEvery manufactured drum

Inspection certificate

Issued with every drum, listing the routine test results for that length.

Product approvals

IEC 60584-3 Class 1 & Class 2 CertifiedANSI/ISA MC96.1 & ASTM E230 CompliantCE, RoHS 2 (2011/65/EU) & REACH

Company certificates

ISO 9001ISO 14001ISO 45001VDE marks approvalUL / cULCE · LVD / EMC

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX EX TYPE E EXTENSION <size> IEC 60584-3 CLASS 1 CE
Delivery form
Non-returnable fumigated wooden drums
Standard lengths
500 m · 1000 m standard drums (cut lengths on request)
MOQ
500 m (stock sizes) · 1000 m (custom)
Lead time
2–4 weeks ex-works
Incoterms
EXW, FCA, FOB, CIF, DAP

Technical documents

Downloads

PDFEX / Type E extension Thermocouple Cable – technical datasheet14 sizes · construction, technical data, approvalsXLSXEX / Type E extension spec data (Excel)All 14 sizes with dimensions and data, for your BOM or quotation
Revision
2026-10-20
Updated
2026-10-20

FAQ

Questions engineers ask first

Not covered here? Send your drawing — an engineer replies within 2 business hours.

Why does Type E (EX) generate the highest millivolt output of any standard thermocouple?
Type E pairs the most electropositive base-metal thermocouple leg (Nickel-Chromium, + NiCr) with the most electronegative base-metal leg (Copper-Nickel, − CuNi). Their combined Seebeck coefficient reaches ~68 µV/°C at +100 °C (rising to ~81 µV/°C at +500 °C) — 67 % higher than Type K (~40.6 µV/°C), giving superior signal-to-noise ratio over long cable runs.
Why is Type EX specified instead of Type KX or JX near strong magnetic fields or in damp environments?
Type K contains a magnetic NiAl negative wire and Type J contains a ferromagnetic Iron positive wire that also rusts in humid air. Both conductors in Type EX (NiCr and CuNi) are completely non-ferromagnetic and corrosion-resistant.
How do I distinguish the NiCr (+) and CuNi (−) conductors if both are non-magnetic?
In addition to the insulation colour (IEC: + Violet / − White; ANSI: + Purple / − Red), the Positive (+ NiCr) conductor has ~44 % higher DC resistance than the Negative (− CuNi) conductor (0.71 Ω/m vs 0.49 Ω/m at 1.0 mm²).
How should the screen and drain wire of EX / Type E extension be earthed in instrumentation and Ex-i loops?
To prevent circulating 50/60 Hz ground-loop currents from coupling into millivolt or 4–20 mA signals, the Al/PET screen and tinned copper drain wire of EX / Type E extension should be bonded to the clean instrumentation earth bar at one end only (typically in the control/marshalling cabinet) and insulated against chassis contact at the field transmitter or junction box, in accordance with IEC 60079-14 and EN 50288-7.

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EX / Type E extension Thermocouple Cable

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Type K extension

KX / Type K extension

NiCr/NiAl Class 1 Type K thermocouple extension cable

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JX / Type J extension

Fe/CuNi Class 1 Type J thermocouple extension cable

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TX / Type T extension

Cu/CuNi Class 1 (±0.5 °C) Type T thermocouple extension cable

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NX

Nicrosil/Nisil Type N thermocouple extension cable

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