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Product

instrumentation cable series12 Twisted Pairs (24-Wire)Flat Thermal-Clamping Loom10 mK Dilution Fridge Ready

WQL Cryogenic RibbonWoven 12-twisted-pair (24-wire) 36 AWG cryogenic quantum & bolometer ribbon cable

WQL Cryogenic Ribbon Cable engineered by loom-weaving 12 colour-coded twisted pairs (24 conductors) of 36 AWG (0.127 mm) Manganin, Phosphor-Bronze, Constantan or Copper into a flat, flexible 7.5–9.0 mm wide polyester/PEEK or.

12 Twisted Pairs Crosstalk < -60dB
UHV Low-Outgassing Weave
Quantum & Space Cryo
Polyimide / Formvar Wire
Order designation
WQL-12P-MN36 (Manganin)
Ribbon width
8.0 mm
Single R @ 295 K
34.7 Ω/m
Single R @ 4.2 K
31.2 Ω/m
Wire k @ 4.2 K
0.5 W/m·K
All sizes (4)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Architecture
12 Pairs (24W)
Loom-woven flat ribbon
Wire gauge
36 AWG (0.127 mm
Optional 32 or 38 AWG
Ribbon width
7.5 to 9.0 mm
Thickness ≈ 0.45 mm flat
Alloys stocked
Mang / PhBr / Cu
Or hybrid Cu + Manganin loom
Temp. range
10 mK to 400 K
Clamps flat to gold-plated Cu
Connectors
25-pin Micro-D
Or bare spool for custom looms

Typical values for this cable type, based on NEMA MW 1000 / NASA SP-R-0022A / ASTM B103 — confirmed in the datasheet and quotation for your order.

Application fit

Is WQL Cryogenic Ribbon right for your machine?

Standard high-density DC/low-frequency readout harness in Oxford/Bluefors/Leiden dilution refrigerators, CMB/astronomy TES bolometer focal planes and multi-qubit flux-bias/DC control lines.

Switchgear & control cabinet wiring

Suitable

Flat 0.45 mm thin woven profile clamps directly between gold-plated OFHC copper thermalization plates at 50 K, 4 K, 800 mK, 100 mK and.

Fixed installation

Suitable

Open-weave polyester/PEEK yarn allows vacuum pumping with zero trapped gas pockets and accepts GE 7031 / Stycast 2850FT thermal potting.

Furnace, kiln & high-temp zone

Suitable

Withstands hundreds of 300 K ↔ 10 mK cooldown cycles without wire breakage or delamination.

Energy chain / drag chain

Not suitable

Precision 36 AWG cryogenic cryostat ribbon loom; not for industrial machinery drag chains.

Use PUR-HF Drag-Chain Cable
Typical machinesSuperconducting Quantum Computing (Flux Bias & DC)Dilution Refrigerators (50 K → 4 K → 100 mK → 10 mK)TES & MKID Millimetre-Wave / X-Ray Bolometer ArraysSQUID Multiplexer & Cryogenic CMOS Readout LoomsMulti-Channel Cryogenic Thermometry & Heater Buses

Construction

Layer by layer

WQL Cryogenic Ribbon showing 12 side-by-side twisted pairs (24 wires) of 36 AWG enamelled Manganin, Phosphor-Bronze, Constantan or OFHC Copper held in a flat parallel plane by a continuous lock-stitched polyester or PEEK monofilament weft weave.

123
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
112 twisted pairs (24 wires) × 36 AWG cryogenic alloy24 × 0.127 mm (36 AWG) solid Manganin (Cu86Mn12Ni2), Phosphor-Bronze (CuSn5), Constantan (Cu55Ni45) or OFHC Copper4–5 twists/cm per pair minimizes magnetic loop area and inter-pair crosstalk
2Colour-coded Polyimide (ML) or Formvar wire enamelConcentric 12–15 µm NEMA MW 16-C Polyimide or Formvar enamel in distinct pair/trace coloursIdentifies all 12 pairs from 25-pin Micro-D pin 1 to 24
3Loom-woven polyester or PEEK textile weft binderLow-outgassing continuous filament Polyester (PET, to +150 °C) or PEEK (to +220 °C) weft thread weaving the 12 pairs into a single flat monolayerKeeps every single pair in direct thermal contact with cryostat heat-sink clamps

WQL-12P-MN36 (24 × 36 AWG Manganin)

12 twisted pairs of 36 AWG Manganin for low-thermal-EMF DC bias and 6 × 4-wire sensor readout

WQL-12P-PB36 (24 × 36 AWG Phosphor-Bronze)

12 twisted pairs of non-magnetic 36 AWG Phosphor-Bronze for SQUID, TES bolometer and high-B-field looms

WQL-12P-HYB (9P Manganin + 3P Cu 36 AWG)

Hybrid 12-pair loom combining 9 low-heat-load Manganin pairs + 3 low-resistance Copper heater/current pairs

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on NEMA MW 1000 / NASA SP-R-0022A / ASTM B103. Values for your order are confirmed in the datasheet and quotation.

Electrical

Single-wire DC R @ 295 K
34.7 Ω/m (Manganin 36 AWG) · 48.0 Ω/m (Phos-Bronze 36 AWG) · 1.36 Ω/m (Cu)
Single-wire DC R @ 4.2 K
31.2 Ω/m (Manganin) · 41.8 Ω/m (Phos-Bronze) · ~0.015 Ω/m (Cu)
Pair capacitance @ 1 kHz
≈ 65 to 85 pF/m
Dielectric withstand
≥ 500 V DC (wire-to-wire and pair-to-clamp)

Thermal

Operating temperature
10 mK to +150 °C (Polyester weave) · 10 mK to +220 °C (PEEK weave)
Total 24-wire heat load
< 45 µW from 4 K to 100 mK (30 cm Manganin 36 AWG loom)
Thermal anchoring
Monolayer flat geometry eliminates inner-core thermal shorts

Mechanical

Ribbon width × thickness
8.0 ± 0.5 mm width × 0.45 ± 0.05 mm thickness (12 pairs)
Weight per metre
≈ 3.8 g/m (3.8 kg/km) — featherweight for space/cryo stages
Min. flat fold radius
2.0 mm (can be folded 90° flat around cryostat plate edges)

Resistance

Vacuum outgassing
Meets NASA SP-R-0022A / ECSS-Q-ST-70-02C UHV outgassing limits
Potting compound bond
Woven weft wicks Apiezon N grease, GE 7031 & Stycast 2850FT
Magnetic cleanliness
WQL-12P-PB36 uses non-magnetic Phosphor-Bronze + non-magnetic MDM option

Reference standards

Magnet wire standard
NEMA MW 1000 / IEC 60317
Connector interface
Compatible with MIL-DTL-83513 25-pin Micro-D (MDM-25) & Nano-D
RoHS & REACH
2011/65/EU & EC 1907/2006 compliant

Identification

Pair colour coding
Repeatable colour-coded pairs across the 8 mm ribbon width
Customs tariff (HS)
8544.4993
Supply formats
Bulk spools (5 m, 10 m, 25 m) or terminated 25-pin Micro-D harnesses

Sizes

4 standard WQL 12-Twisted-Pair (24-Wire) Cryogenic Ribbon configurations

Conductor metallurgy, single-wire resistance at 295 K and 4.2 K, ribbon width and 4 K thermal conductivity.

Metallurgy, resistance & thermal load
Order designation24-wire metallurgy & weaveWidth
mm		R @ 295K
Ω/m		R @ 4.2K
Ω/m		k @ 4.2K
W/m·K		Enquiry
12-Twisted-Pair (24 × 36 AWG) Loom-Woven Cryogenic Ribbon Cables
WQL-12P-MN36 (Manganin)12P × 36 AWG Manganin · PET Weave8.034.731.20.5
WQL-12P-PB36 (Phos-Bronze)12P × 36 AWG Phosphor-Bronze · Non-Mag8.048.041.82.2
WQL-12P-CN36 (Constantan)12P × 36 AWG Constantan (Cu55Ni45)8.038.637.50.8
WQL-12P-CU36 (OFHC Copper)12P × 36 AWG OFHC Copper · Iso-Thermal Stage8.01.40.0350.0
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Can be supplied with overall braided CuNi / tinned-copper stainless-steel EMC overshield and non-magnetic 25-pin Micro-D connectors.

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
100 % 24-wire continuity, pair-to-pair 500 V DC hi-pot & DC R testZero shorts/opens and DC resistance within ±2 % across all 12 pairsEvery manufactured loom / harness
Sample tests
Inter-pair audio/kHz crosstalk & pin-map verificationCrosstalk ≤ -60 dB @ 10 kHzPer production lot
Liquid nitrogen (77 K) & liquid helium (4.2 K) clamp thermal cycle testSurvives 25 thermal shock cycles under copper bar clamping pressureQualification test

Inspection certificate

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

Product approvals

NEMA MW 1000 Cryo WireNASA SP-R-0022A Low OutgasMIL-DTL-83513 Micro-D Ready

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

Cleanroom pouch tag: TEBAOFLEX WQL-12P 24x36AWG CRYOGENIC LOOM
Delivery form
Fumigated wooden drums, steel reels or precision spools
Standard lengths
500 m · 1000 m (or custom cut/spooled lengths)
MOQ
100 m (standard) · 500 m (custom)
Lead time
2–4 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFWQL Cryogenic Ribbon – technical datasheet4 sizes · construction, technical data, approvalsXLSXWQL Cryogenic Ribbon spec data (Excel)All 4 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 is a flat woven ribbon cable (WQL) vastly superior to a round bundled cable inside a dilution refrigerator?
In vacuum at 4 K or 100 mK, heat leaves a wire only through solid conduction at the thermal clamps—there is no air convection. In a round 24-wire cable, the inner wires are thermally insulated by the outer wires, so room-temperature phonons travel straight down the centre of the bundle into the 10 mK mixing chamber! WQL weaves all 12 twisted pairs side-by-side in a single 0.45 mm flat monolayer so every wire is pressed directly against the gold-plated copper heat-sink clamp at every stage.
Why does a 12-pair (24-wire) ribbon mate with a 25-pin Micro-D (MDM-25) connector?
Standard dilution-refrigerator DC wiring ports use 25-pin Micro-D connectors: pins 1–12 and 14–25 carry the 12 twisted pairs (24 conductors), while pin 13 (or the connector shell) is reserved for the overall shield or chassis ground.
How do we choose between Manganin (WQL-12P-MN36), Phosphor-Bronze (PB36) and Constantan (CN36)?
Choose Manganin for general DC qubit flux lines, gate biases and 4-wire thermometry where low thermal EMF against copper (< 1.5 µV/K) is desired. Choose Phosphor-Bronze for TES/SQUID bolometers and high-magnetic-field experiments where strictly zero magnetic Ni/Fe/Mn is required. Choose OFHC Copper (CU36) only for isothermal wiring on the same temperature plate.
Can we order custom pair counts (such as 25-pair / 50-wire for 51-pin Micro-D) or hybrid wire gauges?
Yes. Looms can be custom-woven with 4, 8, 12, 24 or 25 twisted pairs and mixed gauges (for example 32 AWG Copper current pairs + 36 AWG Manganin voltage pairs).

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WQL Cryogenic Ribbon

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