IN STOCK IRAQ WAREHOUSE (ERBIL / BAGHDAD) | IP68 Hermetically Sealed (Waterproof to 1 Meter Submersion) | COSQC IRAQ VERIFIED
4 LINE Junction Boxes (Tab 3) TAB-3

4 LINE Stainless Steel Weighbridge Junction Box

Small truck scales, 4-cell platform scales, tank and hopper weighing assemblies.

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HARDWARE OPTICAL VIEW Summing for 2, 3, or 4 Load Cells
4 LINE Stainless Steel Weighbridge Junction Box Summing for 2, 3, or 4 Load Cells IP68 Hermetically Sealed (Waterproof to 1 Meter Submersion)
Metrological Verification: High-Precision Multi-Turn Potentiometers (0.1% Trim)
Summing Channels
Summing for 2, 3, or 4 Load Cells Parallel cell summation
Pit Water Sealing
IP68 Hermetically Sealed (Waterproof to 1 Meter Submersion) IP68 Submersion tested
Surge Arrestors
Built-in Gas Discharge Surge Arrestors on Each Line (10,000A Discharge) Lightning transient barrier
Earthing Stud
Transient Voltage Suppressors (TVS Diodes on Excitation & Signal) < 1.0 Ohm copper bonding
Corner Trimmers
High-Precision Multi-Turn Potentiometers (0.1% Trim) Zero-interaction calibration
Operating Temp
-40°C to +85°C (Full Desert Tolerance in Iraq) Scale pit harsh range
Enclosure Alloy
Grade 304 Stainless Steel Housing with Silicone Foam Gasket Heavy 304 stainless / cast
Insertion Loss
Temperature Drift < 5 ppm/°C Gold-plated PCB traces

Precision Metrology & Electrical Specifications

SPEC VERSION: 2026.1 / CALIBRATION VERIFIED
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Structural Architecture 4-Channel Signal Summing Junction Box
Summing Capacity & Load Cell Channels Summing for 2, 3, or 4 Load Cells
PCB Trace Purity & Insertion Loss Zero Signal Attenuation (Direct Heavy Bus Rails)
Summing Homogeneity & Signal Margin Temperature Drift < 5 ppm/°C
Load Cell Input Resistance Compatibility Input: Compatible with 350 Ω to 1000 Ω Load Cells | Output: Standard Instrument Input Match
Insulation Resistance ≥ 10,000 MΩ (Tested at 50V DC)
Excitation Pass-Through Rating Up to 20V AC/DC
Compensated Temperature Range -40°C to +85°C (Full Desert Tolerance in Iraq)
Lightning Surge Arrestors & Ground Lug Safe: Built-in Gas Discharge Surge Arrestors on Each Line (10,000A Discharge) | Ultimate: Transient Voltage Suppressors (TVS Diodes on Excitation & Signal)
Integral Cable Specification 5 x IP68 PG9/PG11 Waterproof Brass-Nickel Cable Glands

4 LINE: Enclosure Metallurgy, Waterproof Glands & Pit Ingress Protection

Summing Junction Box Architecture
4 LINE Enclosure Metallurgy & Gasket Sealing

Grade 304 Stainless Steel Housing with Silicone Foam Gasket. Engineered for prolonged moisture immersion in scale pits across Iraq.

  • Deep-drawn 304 heavy-gauge stainless steel or die-cast aluminum enclosure prevents pit rust.
  • Continuous cellular neoprene perimeter gasket maintains elastic seal under years of compression.
  • Internal and external captive lid screws made of A2/A4 grade marine stainless steel.
Ingress Protection & Cable Compression (IP68 Hermetically Sealed (Waterproof to 1 Meter Submersion))

Hermetic barrier preventing water and chemical ingress into Summing for 2, 3, or 4 Load Cells summing terminals.

  • Rated IP67 / IP68: Resists submersion in scale pit rainwater without moisture penetration.
  • Equipped with 5 x IP68 PG9/PG11 Waterproof Brass-Nickel Cable Glands with rubber compression grommets to grip cables securely.
  • Equipped with internal breathing membrane plug to equalize vapor pressure while rejecting liquid droplets.

Vibration-Proof Terminals & Corner Trim Convergence

Individual signal trimming for perfect corner balance adjustment; heavy copper grounding terminal.

Precision Multi-Turn Trimmers High-Precision Multi-Turn Potentiometers (0.1% Trim) on each channel allow zero-interaction corner tuning in minimal test truck passes.
Spring-Clamp Terminal Blocks Anti-vibration screw-down or cage-clamp terminals prevent wire loosening under severe 40-ton truck impacts.
Heavy Grounding Bus Bar Transient Voltage Suppressors (TVS Diodes on Excitation & Signal) for direct foundation lightning bonding.

4 LINE: Multi-Channel Parallel Summing, Surge Arrestors & Home-Run Trunk Wiring

Hardware Interface Map
Channel Terminals & Indicator Trunk Connection Map
CELL INPUT 1..N +Exc, -Exc, +Sig, -Sig, Shield (Summing for 2, 3, or 4 Load Cells independent channels)
HOME RUN TRUNK 6-Core shielded connection to Indicator (+Exc, -Exc, +Sig, -Sig, +Sen, -Sen)
GDT SURGE STAGE Built-in Gas Discharge Surge Arrestors on Each Line (10,000A Discharge) on every excitation and signal conductor
TVS DIODE STAGE High-speed transient voltage suppressors clamp high-frequency line spikes
GROUND STUD Transient Voltage Suppressors (TVS Diodes on Excitation & Signal) to copper earthing ring (< 1.0 Ohm resistance)
Corner Balance Calibration & Signal Integrity
  • Load Cell Compatibility: Compatible with 350 Ω to 1000 Ω Load Cells provides universal summing matching.
  • Insertion Loss: Temperature Drift < 5 ppm/°C ensures pure millivolt output with zero signal degradation.
  • PCB Trace Purity: Zero Signal Attenuation (Direct Heavy Bus Rails) prevents galvanic corrosion between terminal joints.
  • Operating Voltage: Up to 20V AC/DC compatible with all commercial indicators.
Scale Pit Humidity & Desiccant Pack Advisory: In pit-mounted weighbridges across central and southern Iraq, mount 4 LINE at least 400mm above the pit floor. Always place fresh industrial silica-gel desiccant packs inside the enclosure before tightening the lid screws.

4 LINE: Regional Field Performance Across Iraq & High Water Tables

COSQC Legal Verification
Southern Iraq (Basra Water Table & Flooding)

High saline groundwater often submerges weighbridge pits during winter storms. IP68 sealed stainless boxes prevent corrosive water from shorting out cell signals.

Central Iraq (Baghdad & Western Corridors)

Severe electrical ground potential differentials caused by dry soil conditions. Multi-stage 10kA surge arrestors protect sensitive indicators from lightning discharges.

Kurdistan Region (Quarry & Cement Scales)

Heavy aggregate haulers create intense platform vibration. Anti-vibration terminal clamps ensure zero signal interruption on high-throughput scales.

Iraqi COSQC Metrological Sealing Compliance

Features mechanical wire-seal hasps on the enclosure lid. COSQC inspectors can apply official legal lead seals after corner-balancing calibration.

Lead-Wire Seal Provision for COSQC Stamping 10kA Lightning Surge Arrestors Certified IP68 Submersion Tested Enclosure

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