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Product

instrumentation cable seriesSeamless Copper MIMS TubeCompressed Piezoceramic CoreClass I WIM & Perimeter

VIBRACOAX Solid-Dielectric Piezoelectric Coaxial Vibration &Solid compressed piezoceramic-mineral coaxial WIM, impact & perimeter sensing cable

VIBRACOAX Solid-Dielectric Piezoelectric Coaxial Sensing Cable (3.0 mm copper tube / 3.9 mm PU-jacketed) manufactured by compacting radially polarized piezoelectric mineral/ceramic powder between a solid copper centre conductor and a.

Solid Seamless Cu Tube
100 % Hermetic Metal Wall
-55 to +125 °C Duty
ASTM E1318 / COST 323
Order designation
VIBRACOAX 3.9-PU-CL1
Outer Ø
3.90 mm
Weight ≈
49 kg/km
Capacitance
820 pF/m
Uniformity ±
5 %
All sizes (3)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Construction
Copper MIMS coax
Solid Cu core + seamless Cu tube
Dielectric
Piezoceramic
Radially poled mineral matrix
Bare / jacket OD
3.0 / 3.9 mm
Bare Cu tube or Black PU sheath
Capacitance
820 ± 80 pF/m
High charge capacity @ 1 kHz
Operating temp.
-55 to +125 °C
Exceeds PVDF polymer limits
Fatigue life
> 10⁸ axle loads
Inorganic mineral-ceramic core

Typical values for this cable type, based on ASTM E1318 / COST 323 / EN 50131-1 — confirmed in the datasheet and quotation for your order.

Application fit

Is VIBRACOAX right for your machine?

Combines the rugged hermeticity of a Mineral-Insulated Metal-Sheathed (MIMS) copper tube with a radially poled piezoceramic mineral dielectric—withstanding hot asphalt (+125 °C), extreme wheel loads and 20-year buried/fence security duty.

Fixed installation

Suitable

Embedded inside aluminium/elastomer highway WIM rails or strapped to chain-link, weldmesh and palisade perimeter fences.

Immersion & wet locations

Suitable

Seamless drawn copper outer tube is 100 % impermeable to water, road salt, bitumen and soil chemicals.

Furnace, kiln & high-temp zone

Suitable

Operates up to +125 °C without Curie depolarization, surviving hot-mix asphalt paving and high-temp exothermic grouts.

Energy chain / drag chain

Not suitable

Formable solid-copper-sheathed transducer cable; not for continuous flexing drag chains.

Use PUR-HF Drag-Chain Cable
Typical machinesHigh-Speed Highway Weigh-In-Motion (Class I WIM)Military Base, Airport & Prison Perimeter FencesBank Vault Wall, Roof & Buried Ground IntrusionBallistic Acoustic Target Scoring & Impact GaugesRail Wheel-Flat & Bogie Hunting Trackside Detectors

Construction

Layer by layer

VIBRACOAX showing solid annealed copper centre electrode, high-density compacted and radially poled piezoelectric ceramic/mineral dielectric powder, seamless drawn copper outer tubular electrode, and optional UV-stabilized black polyethylene/polyurethane jacket.

1234
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Solid annealed copper centre electrode1.0 mm diameter solid high-conductivity annealed copper rodForms the positive charge-collecting inner electrode (≤ 22 Ω/km)
2Compacted radially poled piezoceramic mineral powderSintered ferroelectric piezoceramic + mineral oxide powder compacted under high swaging pressure and radially polarizedGenerates uniform pC/N charge output without organic polymer aging
3Seamless cold-drawn copper outer tubular electrodeSeamless drawn annealed copper tube (3.00 ± 0.05 mm OD, ~0.25 mm wall)Provides 100 % hermetic moisture seal and 100 dB Faraday EMI shielding
4UV-stabilized Polyurethane (PU) / PE protective jacketExtruded Black UV-stabilized Polyurethane or Polyethylene outer sheath (bringing OD to 3.9 mm)Prevents copper corrosion in soil/concrete and cushions fence ties

VIBRACOAX-3.0-CU (3.00 mm Bare Copper)

Unjacketed 3.00 mm seamless copper tube sensor for potting inside metallic WIM road profiles

VIBRACOAX-3.9-PU (3.90 mm Jacketed)

3.00 mm copper VIBRACOAX with 0.45 mm Black UV-PU jacket for perimeter fences and buried intrusion

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on ASTM E1318 / COST 323 / EN 50131-1. Values for your order are confirmed in the datasheet and quotation.

Electrical

Piezoelectric sensitivity
≈ 15 to 22 pC/N (calibrated to ±5 % or ±10 % uniformity class)
Linear capacitance @ 1 kHz
820 ± 80 pF/m (@ 20 °C)
Insulation resistance
≥ 10¹¹ Ω·m @ 100 V DC (hermetically sealed)
Transfer impedance
< 1 mΩ/m (solid seamless copper outer tube)

Thermal

Operating temp. (Bare Cu)
-55 °C to +125 °C continuous (up to +150 °C peak)
Operating temp. (PU Jacket)
-40 °C to +90 °C continuous
Sensitivity temp. stability
≤ ±5 % variation across -20 °C to +70 °C

Mechanical

Outer diameter
3.00 ± 0.05 mm (Bare Cu) · 3.90 ± 0.10 mm (PU Jacketed)
Min. cold bend radius
20 mm (hand-formable annealed copper tube)
Hydrostatic crush strength
> 100 MPa radial compression without short-circuit

Resistance

Dynamic axle fatigue life
> 100,000,000 axle passes (inorganic mineral-ceramic core)
Moisture permeability
Zero (100 % seamless metallic copper tube barrier)
EMI / lightning immunity
Solid copper tube shields inner conductor from 50/60 Hz & RF

Reference standards

Highway WIM standards
ASTM E1318 & COST 323 Class I Weigh-In-Motion
Perimeter security std
EN 50131-1 Intrusion & Hold-Up Alarm Systems
RoHS & REACH
2011/65/EU & EC 1907/2006 compliant

Identification

Surface finish
Bright annealed copper (3.0 mm) or Matte Black UV-PU (3.9 mm)
Customs tariff (HS)
8544.2000
End sealing
Supplied with hermetically sealed ends or factory spliced RG-58 feeder

Sizes

3 standard VIBRACOAX solid-dielectric piezoelectric configurations

Dimensions, uniformity grade, capacitance and sensitivity for bare copper and PU-jacketed sensors.

Dimensions & piezoelectric uniformity
Order designationJacket & uniformity classOuter Ø
mm		Weight ≈
kg/km		Capacitance
pF/m		Uniformity
±%		Enquiry
Solid-Dielectric Copper-Sheathed Piezoelectric Coaxial Cables
VIBRACOAX 3.0-CU-CL1Bare Copper Tube · Class I WIM (±5 % Uniformity)3.00428205
VIBRACOAX 3.9-PU-CL1PU Jacketed · Class I WIM (±5 % Uniformity)3.90498205
VIBRACOAX 3.9-PU-SECPU Jacketed · Perimeter Fence & Intrusion (±10 %)3.904982010
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Can be supplied as custom cut-to-lane WIM sensor bars (1.8 m to 4.0 m) or up to 300 m perimeter security zones.

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 pressure-roller sensitivity profileLongitudinal sensitivity within ±5 % (Class I WIM) or ±10 % (Security)Every manufactured length
100 % 1 kHz capacitance, tan δ & 500 V DC insulation resistanceC = 820 ± 80 pF/m and hermetic IR ≥ 10¹¹ Ω·mEvery manufactured length
Sample tests
10⁸ cycle dynamic hydraulic fatigue & +125 °C thermal aging< 3 % sensitivity change after 100 million load cyclesType qualification

Inspection certificate

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

Product approvals

COST 323 Class I WIMASTM E1318 CompliantEN 50131-1 Security Grade

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

Print on PU jacket / metal tag: TEBAOFLEX VIBRACOAX 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

PDFVIBRACOAX Solid-Dielectric Piezoelectric Coaxial Vibration & – technical datasheet3 sizes · construction, technical data, approvalsXLSXVIBRACOAX spec data (Excel)All 3 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.

When should we choose VIBRACOAX instead of PolyK Cable-F002 (PVDF piezoelectric cable)?
Choose VIBRACOAX when you need a seamless metallic copper tube with zero moisture permeation over 15–20 years in wet roadbeds, high crush strength (> 100 MPa), > 10⁸ axle fatigue life, and +125 °C thermal stability (such as hot-poured asphalt or high-exotherm grouts). Choose PolyK Cable-F002 when you need a flexible polymeric cable that can be coiled and flexed repeatedly without work-hardening a metal tube.
How does VIBRACOAX detect fence cutting, climbing or buried footsteps in perimeter security?
When clipped along a chain-link or weldmesh fence (or buried 20–30 cm underground), mechanical vibrations from wire cutters, climbing impacts or footsteps bend and compress the copper tube, generating millivolt/picocoulomb signals across the 20 Hz–5 kHz acoustic band that an intrusion processor filters from wind and rain.
Why must the cut ends of VIBRACOAX be hermetically sealed?
Like nuclear MIMS cables, the compacted mineral-ceramic powder inside the copper tube will absorb atmospheric humidity if left open, reducing low-frequency insulation resistance. Factory-terminated assemblies use glass-to-metal or epoxy-filled brass crimp sleeves.
Does VIBRACOAX require an external power supply along the fence or road?
No. The piezoelectric mineral dielectric is self-generating (passive transducer), so zero electrical power is routed into the road pavement or explosive/outdoor fence zone.

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