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Product

Multi-electrode ERT & IP geophysical cable1,000 V DC Rated≥ 1,000 MΩ·km IR24 / 32 / 48 / 64 Takeouts

ERT Resistivity Takeout Assembly24, 32, 48 & 64-takeout polyaramid-reinforced ERT & IP resistivity spread cable

Multi-electrode Electrical Resistivity Tomography (ERT) and Induced Polarization (IP) spread cable rated to 1,000 V DC with IP68 stainless-steel takeouts at 1–10 m spacing for 24-, 32-, 48- and 64-channel resistivity imaging receivers.

Water-resistant
Outdoor & humid
Ozone, UV & moisture
Oil-resistant
Order designation
ERT-24T-5M-SS-KPT32
Node spacing
5 m
Total length
125 m
Cable OD
9.8 mm
Complete weight
17.2 kg
All sizes (12)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Takeouts/cable
12 to 64 Nodes
Stainless-steel ring or Mueller clip
Node spacing
1 m to 10 m
Standard 2 m, 5 m & 10 m intervals
Voltage rating
1,000 V DC
Supports up to 2.5 A current injection
Insulation R
≥ 2,000 MΩ·km
Prevents IP phase & leakage errors
Tensile load
2.5–4.5 kN
Central/braided polyaramid strength core
Sealing
IP68 Takeouts
Double-moulded PUR takeout sleeves

Typical values for this cable type, based on ASTM D5777 / ASTM G57 / MIL-DTL-26482 — confirmed in the datasheet and quotation for your order.

Application fit

Is ERT Resistivity Takeout Assembly right for your machine?

Built for rugged cross-country dragging across rock, desert sand, waterlogged clay, and shallow river crossings.

Trailing & towing

Suitable

Polyaramid tensile member (2.5–4.5 kN breaking strength) and tough polyether PUR jacket withstand hand and ATV field dragging.

Immersion & wet locations

Suitable

Double-overmoulded IP68 polyurethane takeout nodes and water-blocked cores prevent leakage currents during ERT and IP surveys.

Motorised monospiral reel

Suitable

Arctic-to-desert −40 °C to +80 °C flexibility and UV stability for portable field reel deployment.

Energy chain / drag chain

Not suitable

Geophysical field spread cable is designed for outdoor ground deployment, not factory automation cable carriers.

Use M12 A-coded Cordset
Typical machinesGroundwater & Hydrogeological MappingMineral Exploration (Gold / Copper IP-ERT)Karst Void & Geotechnical Site InvestigationDam Embankment Seepage MonitoringEnvironmental Contamination Plume Tracking

Construction

Layer by layer

Representative 24- or 32-takeout ERT cable: central high-modulus polyaramid strength member + 24/32/48/64 × 0.35–0.50 mm² high-IR PE/PP-insulated tinned copper cores + PUR outer sheath + hermetically overmoulded 316L stainless-steel takeout rings.

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Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Stranded tinned copper electrode conductors24, 32, 48 or 64 × 0.35 mm² (22 AWG) or 0.50 mm² (20 AWG) tinned copper conductors (IEC 60228 Class 5)Carries up to 2.5 A DC/commutated current injection and microvolt potential measurements
2High-dielectric PE / FEP core insulationThick-wall high-density polyethylene (HDPE) or fluoropolymer core insulation (≥ 2,000 MΩ·km insulation resistance, 1,000 V DC rated)Eliminates inter-core leakage and capacitive coupling during time-domain IP decay windows
3Central polyaramid tensile core2.5 kN to 4.5 kN low-stretch polyaramid yarn core (plus optional outer polyaramid braid)Transfers field pulling loads directly to the connector strain reliefs so copper cores never stretch
4Water-swellable barrier wrapLongitudinal water-blocking tape wrap over the cabled core bundlePrevents capillary moisture migration if the outer jacket is nicked by sharp rock
5Cut-resistant field polyurethane (PUR) jacketExtruded high-visibility yellow, orange or red polyether polyurethane (PUR) outer sheath with double-moulded 316L stainless-steel cylindrical takeout sleevesHermetically seals every electrode breakout to IP68 while resisting rock abrasion

ERT-PASSIVE (Passive Multi-Core Takeout Cable)

21, 24, 32, 48 or 64 direct copper cores routed to stainless-steel ring or spring-clip takeouts (for 21/24/32/48/64-channel resistivity & IP switches)

ERT-MARINE / BOREHOLE (Submersible String)

Water-blocked 5–10 bar submersible ERT cable with moulded cylindrical marine graphite/316L electrodes for riverbeds and boreholes

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on ASTM D5777 / ASTM G57 / MIL-DTL-26482. Values for your order are confirmed in the datasheet and quotation.

Electrical

Max. working voltage
1,000 V DC / peak commutated square wave
Max. injection current
2.5 A per electrode takeout
Conductor resistance
≤ 55 Ω/km (0.35 mm²) · ≤ 39 Ω/km (0.50 mm²)
Core-to-core insulation resistance
≥ 2,000 MΩ·km at 1,000 V DC
Dielectric withstand test
3,000 V DC for 1 min between all cores and water bath

Thermal

Field operating temperature
−40 °C to +80 °C
Cold-bend flexibility
No cracking at −40 °C (IEC 60811-504)

Mechanical

Takeouts per cable section
12, 21, 24, 32, 48 or 64 takeouts
Standard takeout intervals
1 m, 2 m, 3 m, 5 m, 10 m (custom spacing available)
Tensile breaking strength
2.5 kN (standard) · 4.5 kN (heavy-duty polyaramid)
Takeout electrode interface
316L stainless cylinder ring, Mueller clip or banana jack
Min. bend radius
8 × OD

Resistance

Takeout ingress protection
IP68 (10 m water immersion for 72 h)
Abrasion resistance
DIN ISO 4649 ≤ 35 mm³ polyether PUR
Mud, oil & acid-mine drainage
Resistant to pH 2–12 groundwater and hydrocarbons

Reference standards

Geophysical survey guide
ASTM D5777 / ASTM G57
Connector interface
MIL-DTL-26482 Series 1 (26/32/61-pin bayonet) & IP68 circular

Identification

Outer jacket colour
High-Visibility Yellow, Orange or Red
Takeout numbering
Laser-engraved electrode #1 to #N on every moulded sleeve
Customs tariff (HS)
8544.42 / 9015.80

Sizes

12 standard multi-electrode ERT & IP resistivity spread cable assemblies

Compatible with 21-, 24-, 32-, 48- and 64-channel resistivity receivers and 32/61-pin MIL-DTL-26482 switching units.

Takeout counts, spacing, length & weight
Order designationTakeout Count & TypeSpacing
m		Total Length
m		End ConnectorsCable OD
mm		Complete Wt
kg		Break Load
kN		Enquiry
21 & 24-Takeout ERT Spread Cables (Standard Multi-Electrode Roll-Along Spreads)
ERT-21T-2M-SS-KPT3221 × 316L Cylinder Rings2 m442 × 32-pin Bayonet9.26.82.5
ERT-21T-5M-SS-KPT3221 × 316L Cylinder Rings5 m1102 × 32-pin Bayonet9.514.53.0
ERT-21T-10M-SS-KPT3221 × 316L Cylinder Rings10 m2202 × 32-pin Bayonet9.828.23.5
ERT-24T-2M-SS-KPT3224 × 316L Cylinder Rings2 m502 × 32-pin Bayonet9.67.92.5
ERT-24T-5M-SS-KPT3224 × 316L Cylinder Rings5 m1252 × 32-pin Bayonet9.817.23.0
ERT-24T-10M-SS-KPT3224 × 316L Cylinder Rings10 m2502 × 32-pin Bayonet10.233.53.5
32, 48 & 64-Takeout High-Density & Submersible ERT Spread Cables
ERT-32T-3M-SS-KPT3232 × 316L Cylinder Rings3 m10032-pin Bayonet10.615.83.5
ERT-32T-5M-SS-KPT3232 × 316L Cylinder Rings5 m16532-pin Bayonet10.825.43.5
ERT-32T-10M-SS-KPT3232 × 316L Cylinder Rings10 m33032-pin Bayonet11.249.04.5
ERT-48T-5M-SS-KPT6148 × 316L Cylinder Rings5 m24561-pin Bayonet12.444.04.5
ERT-64T-2M-SS-KPT6164 × 316L Cylinder Rings2 m13061/64-pin Waterproof13.527.64.5
ERT-24T-5M-SUB-IP6824 × Submersible 316L Sleeves5 m125Submersible Wet-Mate11.521.84.5
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Supplied complete with backpack field reel and elastic/spring jumper straps for connecting stainless-steel takeout rings to ground stakes.

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
3,000 V DC water-bath dielectric & insulation resistance testSubmerge entire finished takeout cable in water bath for 4 h; verify ≥ 2,000 MΩ·km at 1,000 V DC on every pin100 % of finished cables
Automated pin-to-takeout mapping & contact resistance testVerify zero cross-wiring and < 55 Ω/km loop resistance on all 21–64 takeouts100 % of finished cables
Sample tests
Tensile load & takeout overmould peel testPull-test polyaramid anchor to 2.5 kN with zero conductor elongation or mould delaminationProduction lot

Inspection certificate

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

Product approvals

ASTM D5777 / ASTM G57 Resistivity Survey CompliantMIL-DTL-26482 Series 1 Waterproof Bayonet Interface

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX ERT MULTI-ELECTRODE RESISTIVITY CABLE 1000V DC IP68 [METRE]
Delivery form
Wound on heavy-duty ergonomic backpack field reel with protective dust caps
Electrode accessories
Optional stainless-steel ground stakes and spring-clip / rubber-band jumper leads
Instrument pinouts
Custom 26-pin, 32-pin, 61-pin & 64-pin multi-electrode receiver pinouts
Lead time
2–4 weeks ex-works

Technical documents

Downloads

PDFERT Resistivity Takeout Assembly – technical datasheet12 sizes · construction, technical data, approvalsXLSXERT Resistivity Takeout Assembly spec data (Excel)All 12 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 insulation resistance above 2,000 MΩ·km critical for ERT and Induced Polarization (IP) cables?
During an ERT/IP survey, two conductors carry up to 1,000 V DC / 2.5 A while adjacent conductors in the same bundle measure millivolt potential differences and microvolt IP decay curves. Any moisture ingress at a takeout or low-grade PVC insulation creates leakage paths that corrupt apparent resistivity and chargeability data.
How are the stainless-steel takeout rings sealed against water ingress?
Each 316L stainless-steel cylindrical takeout ring is chemically primed and hot-melt polyurethane overmoulded directly to the stripped TPU cable sheath in a two-stage high-pressure injection mould, creating a monolithic IP68 seal tested in a 3,000 V DC water bath.
Can you wire the 32-pin or 61-pin connectors to match our existing 21-, 24-, 32-, 48- or 64-channel resistivity receiver?
Yes. Simply specify your instrument model (e.g. 21-takeout 32-pin bayonet, 24-takeout roll-along, or 48/64-takeout dual-mode) and roll-along direction when ordering, and we wire the bayonet connector pinout and overlap channels to match.
What prevents the copper conductors from breaking when field crews pull the spread cable across rough terrain?
A high-modulus polyaramid core (2.5 kN to 4.5 kN breaking strength) runs continuously through the centre of the cable and is mechanically anchored inside both end connector backshells, absorbing all pulling tension.

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ERT Resistivity Takeout Assembly

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