1 / 5

Product

instrumentation cable seriesRadially Poled β-PVDFWeigh-In-Motion (WIM)20–25 pC/N Piezo Output

PolyK Cable-F002 PVDF Piezoelectric Coaxial Traffic Axle-WeightPoled β-phase PVDF piezoelectric coaxial traffic WIM & vibration sensing cable

PolyK Cable-F002 PVDF Piezoelectric Coaxial Sensing Cable engineered with a copper inner electrode, radially poled β-phase Polyvinylidene Fluoride (PVDF) ferroelectric copolymer transducer wall (d₃₃ ≈ 20–25 pC/N), silver/copper outer.

Self-Generating Coaxial
Road-Slot Encapsulation
-40 to +85 °C Pavement
ASTM E1318 / COST 323
Order designation
PolyK Cable-F002 (HDPE)
Outer Ø
2.80 mm
Weight ≈
14.5 kg/km
Capacitance
650 pF/m
Piezo sensitivity
22 pC/N
All sizes (2)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Piezo constant
20 to 25 pC/N
Radially poled β-PVDF copolymer
Outer diameter
2.8 ± 0.15 mm
Coaxial sensor element OD
Capacitance
650 ± 100 pF/m
Measured @ 1 kHz, 20 °C
Insul. resist.
≥ 10¹⁰ Ω·m
Low charge-leakage time const.
Operating temp.
-40 to +85 °C
Below Curie depolarization
Fatigue life
> 5 × 10⁷ axles
High-flex polymeric piezo core

Typical values for this cable type, based on ASTM E1318 / COST 323 / IEC 61196-1 — confirmed in the datasheet and quotation for your order.

Application fit

Is PolyK Cable-F002 right for your machine?

Generates a direct electrostatic charge (pC) or voltage pulse proportional to dynamic radial stress or acoustic strain—requiring zero excitation power for highway Weigh-In-Motion (WIM), axle classification and structural vibration sensing.

Fixed installation

Suitable

Potted into Brass/Al road-slot profiles (Class I/II WIM) or clipped directly to security fences and pipelines.

Immersion & wet locations

Suitable

Continuous moisture-proof HDPE or polyurethane outer jacket withstands highway de-icing salt and ground moisture.

Switchgear & control cabinet wiring

Suitable

Connects via low-noise RG-58 / BNC feeder lead directly into charge amplifiers or WIM roadside controllers.

Energy chain / drag chain

Not suitable

Piezoelectric transducer cable; flexing in machinery drag chains generates unwanted piezo charge.

Use PUR-HF Drag-Chain Cable
Typical machinesHighway Weigh-In-Motion (WIM) & Axle CountingToll Plaza Vehicle Classification & Speed EnforcementPerimeter Fence & Buried Pipeline Intrusion DetectionBridge Stay-Cable & Wind-Turbine Blade VibrationSleep / Vital-Sign Ballistocardiography (BCG) Mats

Construction

Layer by layer

PolyK Cable-F002 showing stranded/solid copper inner electrode, radially corona/contact-poled β-phase PVDF piezoelectric copolymer dielectric, conductive silver/copper braid outer electrode, and tough black HDPE or PU outer protective sheath.

1234
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Central copper inner sensing electrode20 AWG (0.52 mm²) stranded or solid bare/tinned annealed copper centre electrodeCollects radial piezoelectric charge with low series resistance (≤ 36 Ω/km)
2Radially poled β-phase PVDF piezoelectric transducer wallContinuously extruded and high-field radially polarized Poly(vinylidene fluoride-co-trifluoroethylene) / β-PVDF ferroelectric dielectricGenerates 20–25 pC/N sensitivity and ±5 % longitudinal uniformity
3Conductive silver ink + tinned copper braid outer electrodeIntimate conductive inner coating + ≥ 85 % tinned copper wire braid or Al/Cu foil outer Faraday shieldForms grounded return electrode and shields against external 50/60 Hz EMI
4Abrasion-resistant HDPE or Polyurethane (PU) outer jacketUV-stabilized High-Density Polyethylene (HDPE) or flexible Polyurethane outer sheath (nominal 2.8 mm OD)Bonds with polyurethane/epoxy WIM road-slot grout

PolyK Cable-F002-HDPE (2.8 mm OD)

Standard 2.8 mm OD PVDF piezoelectric coaxial cable with HDPE jacket for WIM road-slot sensors

PolyK Cable-F002-PU (3.0 mm Flexible PU)

Flexible polyurethane-jacketed PVDF piezo cable for perimeter fences, mats and curved structures

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on ASTM E1318 / COST 323 / IEC 61196-1. Values for your order are confirmed in the datasheet and quotation.

Electrical

Piezoelectric sensitivity (d₃₃ / g₃₁)
20 to 25 pC/N (hydrostatic/radial) · g₃₁ ≈ 216 × 10⁻³ V·m/N
Linear capacitance @ 1 kHz
650 ± 100 pF/m (@ 20 °C)
Dissipation factor (tan δ)
≤ 0.018 @ 1 kHz
Volume insulation resistance
≥ 10¹⁰ Ω·m @ 100 V DC (20 °C)

Thermal

Continuous operating temp.
-40 °C to +85 °C (safe below β-PVDF Curie transition)
Curie / melting transition
Tc ≈ +115–135 °C · Tm ≈ +170 °C (do not exceed +95 °C)
Sensitivity temp. coeff.
≤ ±8 % variation from -20 °C to +60 °C

Mechanical

Outer diameter
2.80 ± 0.15 mm (HDPE) · 3.00 ± 0.15 mm (PU)
Min. bend radius
10 × OD (28 mm) without piezoelectric depolarization
Acoustic impedance
≈ 2.7 × 10⁶ kg/(m²·s) — close match to water, tissue & polymers

Resistance

Dynamic axle fatigue life
> 50,000,000 heavy-truck axle passes when encapsulated
Moisture & salt resistance
Impervious to road salt, bitumen, epoxy & polyurethane grout
Sensitivity uniformity
≤ ±7 % along continuous sensor length (Class I WIM grade)

Reference standards

Highway WIM standards
ASTM E1318 & European COST 323 WIM Specification
Coaxial test methods
IEC 61196-1
RoHS & REACH
2011/65/EU & EC 1907/2006 compliant (Lead-free vs PZT)

Identification

Sheath colour
Black HDPE or Black PU with lot calibration sheet
Customs tariff (HS)
8544.2000
Polarity convention
Centre Cu = Positive (+ charge on compression) · Braid = Shield (-)

Sizes

2 standard PolyK Cable-F002 PVDF piezoelectric configurations

Dimensional, capacitance and piezoelectric sensitivity data for HDPE and PU jacketed sensor cables.

Dimensions & piezoelectric ratings
Order designationOuter jacket & dutyOuter Ø
mm		Weight ≈
kg/km		Capacitance
pF/m		Sensitivity
pC/N		Enquiry
Radially Poled β-PVDF Piezoelectric Coaxial Sensor Cables
PolyK Cable-F002 (HDPE)HDPE Jacket · WIM Road-Slot & Axle Sensor2.8014.565022
PolyK Cable-F002-PUFlexible PU Jacket · Fence, Vibration & BCG3.0016.065022
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Supplied on reels (50 m, 100 m, 500 m) or as pre-terminated WIM/fence sensor elements with non-piezoelectric RG-58 feeder leads.

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 % continuous dynamic roller sensitivity & uniformity scanSensitivity 20–25 pC/N with ≤ ±7 % longitudinal variationEvery manufactured reel
100 % 1 kHz capacitance, tan δ & 500 V DC insulation resistanceC = 650 ± 100 pF/m, tan δ ≤ 0.018 and IR ≥ 10¹⁰ Ω·mEvery manufactured reel
Sample tests
Thermal cycling (-40 °C to +85 °C) & dynamic impact fatigue test< 5 % sensitivity drift after thermal cycling and 10⁷ load cyclesType qualification

Inspection certificate

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

Product approvals

ASTM E1318 & COST 323 WIMRoHS 2 Lead-Free PiezoREACH EC 1907/2006

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

Reel label: TEBAOFLEX POLYK CABLE-F002 PVDF PIEZO SENSOR
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

PDFPolyK Cable-F002 PVDF Piezoelectric Coaxial Traffic Axle-Weight – technical datasheet2 sizes · construction, technical data, approvalsXLSXPolyK Cable-F002 spec data (Excel)All 2 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.

How does PolyK Cable-F002 (poled β-PVDF copolymer) differ from VIBRACOAX (mineral/ceramic piezo coaxial cable)?
PolyK Cable-F002 uses a flexible polymeric β-phase PVDF dielectric with low acoustic impedance (matched to elastomers/water), high voltage coefficient (g₃₁ ≈ 216 mV·m/N), and zero brittle ceramic cracking under tight 28 mm bends. VIBRACOAX uses a compressed piezoelectric mineral/ceramic powder inside a solid copper tube for rigid high-temperature or heavy-crush road/fence sensors.
Why must Soldering or Epoxy Curing temperatures on PVDF sensor cable stay below +90 °C?
The piezoelectric activity of β-phase PVDF is created by orienting molecular dipoles under a high electric field. Heating above +95–100 °C approaches the Curie/relaxation transition and permanently depolarizes the polymer. Always use low-exotherm (< +80 °C) road-slot grouts and crimp or low-temp Indium/BiSn solder joints.
Should PolyK Cable-F002 be read out with a Charge Amplifier or a Voltage Amplifier?
For Weigh-In-Motion (WIM) axle weighing, a Charge Amplifier (integrating pC charge) is preferred because its output is independent of feeder-cable capacitance and low-frequency temperature drift. For axle counting, speed trigger or fence intrusion, a high-input-impedance (≥ 10 MΩ) voltage amplifier can be used.
Why is a passive RG-58 feeder lead spliced onto the PVDF cable outside the road lane?
Because the entire length of PolyK Cable-F002 is piezo-active, routing it through roadside conduits would pick up unwanted vibration. Only the active 1.8 m or 3.6 m lane width uses Cable-F002, spliced via a waterproof joint to passive low-noise coaxial feeder cable.

Request a quote

Get an engineering quote for PolyK Cable-F002

Your selection and application details are copied into the enquiry form below.

01Selected sizes

Use + Add next to a size or configuration.

02Reel & motion

Add your operating conditions here to include them in your enquiry.

03Message for our engineers

PolyK Cable-F002 PVDF Piezoelectric Coaxial Traffic Axle-Weight

Selected sizes:


Reel & motion:
- Reel type: 
- Drum core diameter (mm): 
- Cable length on drum (m): 
- Travel speed (m/min): 
- Max. acceleration: 
- Cycles per hour: 
- Length and quantity: 
- Ambient temperature: 
- Exposure (outdoor, water, oil, abrasion): 
- Destination country: 
- Equipment and operating conditions:
Send via WhatsApp

Ceramic piezo coax

VIBRACOAX

Solid dielectric piezoelectric ceramic coaxial vibration/WIM cable

View productOptical acoustic DAS

BRUsens DAS Acoustic

Distributed acoustic sensing (DAS) optical fibre cable

View productOptical strain DSS

BRUsens DSS V9 Grip

Structured-jacket civil & geotechnical optical strain cable

View productWater leak sensing

TraceTek TT1000 / TT1100-OHP

Conductive-polymer water leak detection & location cable

View product
DatasheetRequest a quote