Four-Detector Gamma Vehicle Portal

Wide-lane gamma screening

The PoliGate™ Vehicle G4 is a double-sided, gamma-only radiation portal monitor for Australian ports, borders, rail heads, and industrial gateways. Four 11 L plastic scintillator detectors with lead shielding provide high-sensitivity screening across control zones up to 6 m × 4.5 m, even with vehicles moving at up to 20 km/h.

Modular hardware (pillar height, lane width, CCTV integration, cabinet placement) and an Ethernet-connected operator workstation as your “companion app” support an end-to-end workflow from installation and tuning through to alarm review, incident export, and long-term reporting.

Why Teams Choose PoliGate™ Vehicle G4?

• Wide-lane coverage: Four 11 L plastic scintillators in two pillars cover control zones up to 6 m × 4.5 m, ideal for high-sided trucks, rail wagons, and oversize loads.
• High sensitivity at speed: Detects ¹³⁷Cs down to ~160 kBq at 8 km/h and ~240 kBq at 20 km/h (background <0.1 µSv/h, FAR <1/1000), keeping performance credible under scrutiny.
• Drive-through, no-stop operation: Lanes stay open at 8–20 km/h, avoiding queues and driver pushback common with stop-and-measure setups.
• Rugged for real lanes: IP65 pillars, −30 to 50 °C operating range and up to 98 % RH at 40 °C suit coastal ports, dusty yards, and remote crossings.
• Resilient and integrated: Wide-range AC power with >8 h internal battery, Ethernet connectivity, and optional CCTV alignment support control-room workflows and continuity.

What’s in the Kit?

Four PoliGate™ Vehicle G4 gamma detection blocks (two pillars), electronics/control cabinet with integrated 12 V backup battery, local light and sound alarm hardware, occupancy sensors, mains power cabling, Ethernet interface, operator workstation software licence, installation guide and user manual (site-specific mounting hardware, bollards and CCTV options are configured per project).

Work with our RPM engineers to design a PoliGate™ Vehicle G4 lane matched to your traffic speeds, vehicle profiles, and regulatory standards.

PoliGate™ Vehicle G4 Key Specs

Type: Double-sided, gamma-only radiation portal monitor for vehicles.

Detectors: Plastic scintillator (PVT), ~11 L per detector; 4 gamma detectors total (two per pillar).

Radiation: Gamma only; energy range 20 keV – 3 MeV.

Control zone & speeds: Up to 6 m (W) × 4.5 m (H) at 8–20 km/h, drive-through operation, no stop required.

Typical MDAs (8 km/h, 6 × 4.5 m, background <0.1 µSv/h): ²⁴¹Am ~1500 kBq; ¹³⁷Cs ~160 kBq; ⁶⁰Co ~100 kBq; ²³⁸U ~1300 g; ²³⁵U ~80 g; ²³⁹Pu ~2.3 g.

Typical MDAs (20 km/h, 6 × 4.5 m): ²⁴¹Am ~2300 kBq; ¹³⁷Cs ~240 kBq; ⁶⁰Co ~150 kBq; ²³⁸U ~1900 g; ²³⁵U ~120 g; ²³⁹Pu ~3.4 g.

Gamma sensitivity (per detector): ~251 cps per nSv/h (²⁴¹Am); 57 cps per nSv/h (¹³⁷Cs); 27 cps per nSv/h (⁶⁰Co).

False alarm rate: <1/1000 passages (under stated background conditions).

Power: 110 V AC (90–132 V) or 220 V AC (180–264 V), 47–63 Hz; ≤120 V·A; internal 12 V rechargeable battery with >8 h backup.

Comms: Ethernet from control cabinet to operator PC / site network.

Environmental: IP65; −30 to 50 °C; 84–106.7 kPa; up to 98 % RH at 40 °C (non-condensing).

Weights: ~120 kg per detection block; ~20 kg control unit (typical).

Frequently Asked Questions

What radiation does PoliGate™ Vehicle G4 detect?

Vehicle G4 is a gamma-only RPM. It detects elevated gamma radiation from industrial, medical, and nuclear materials; the Vehicle G4N4 model adds neutron detection where that’s a requirement.

How robust is G4 for Australian yard and port environments?

Each detector block is IP65-rated and specified from −30 to 50 °C with high humidity tolerance. Combined with lead shielding and industrial cabinet hardware, it’s built for continuous duty in exposed, dusty, or wet lanes.

What acts as the “companion app” for operators?

The system connects via Ethernet to a Windows®-based operator workstation. The software provides live count-rate and alarm views, configuration, event logging, and optional integration with CCTV and higher-level security systems.

What exactly is included with a Vehicle G4 system?

A standard delivery includes four gamma detectors in two pillars, the electronics/control cabinet with backup battery, local light and sound alarms, occupancy sensors, power and network cabling, and operator software. Site-specific frames, bollards, and video systems are added per project requirements.

Compliance note: Specifications, MDAs, and standards references are based on manufacturer documentation and may change without notice. Agencies remain responsible for confirming local regulatory acceptance, site licensing, and export-control obligations before procurement, installation, or cross-border transfer.