Worker looking up at a wall-mounted security dashboard screen inside a tunnel.

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Everyone inside the tunnel, accounted for. Nobody else gets in.

sentrisystems.com

Everyone inside the tunnel, accounted for. Nobody else gets in.

Sentri Systems

Where security meets innovation, We delivers solutions.

Where safety meets accountability, Sentri Systems never loses track.

Where the tunnel meets the terminal, Sentri Systems keeps watch.

Where manual headcounts stop, Sentri Systems begins.

Real-time worker headcount

Biometric + UHF access control

24/7 CCTV coverage

Site-wide intercom network

Rapid deployment

No disruption to the construction schedule

UHF tracking tag and biometric access badge held in a gloved hand.

How does sentri systems work?

Badge at the gate, and the dashboard knows who's inside. Cameras cover every stretch of tunnel, recorded and reviewable. The surface and every crew stay connected, always.

See our method

Safety and accountability leave no room for guesswork.

Manual sign-in sheets and radio headcounts create delay, blind spots and risk that don't need to exist.

Delayed response

Without live data, a security incident costs precious minutes when they matter most.

No real-time visibility

Without live camera coverage, incidents and hazards go unnoticed until it's too late.

Manual sign-in sheets

Paper logs are slow, easy to falsify and impossible to verify in an emergency.

Unauthorized access

Without badge or biometric control, anyone can walk into an active tunnel.

Unverified headcounts

Radio-based counts leave room for error exactly when accuracy matters most.

No audit trail

Without recorded footage and access logs, investigations rely on memory.

Find out how Sentri Systems solves all these problems

Sentri Systems is your technical partner for tunnel construction site security.

Every project is treated as a technical safety installation rather than a bolt-on extra, with the focus on visibility, controlled access and full accountability.

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Specialisation

Tunnel and underground construction security is our core business.

Industrial discipline

Execution in accordance with industrial standards and safety guidelines.

Focus on continuity

Minimal disruption, maximum control.

UHF/RFID reader panel glowing at a tunnel access gate.

Cabling and an intercom unit mounted on a tunnel wall.

CCTV camera housing mounted on tunnel concrete.

Technically controlled execution from analysis to restart.

STEP 1

Analysis and Risk Assessment

Technical evaluation of the site, access points and workforce before starting. If necessary, a pilot zone is implemented to validate coverage and suitability.

STEP 2

Safety Alignment

Alignment with site procedures, LMRA and applicable safety guidelines. Installation is carried out according to the required safety standards and working conditions.

STEP 3

Execution

Hardware and network parameters adjusted to suit the site and application. Targeted installation with a focus on control, precision and minimal disruption.

STEP 4

Restart

Minimal disruption and controlled handover. The system goes live and is returned to full operational status in a safe, controlled manner.

SECTORS

Built for critical production environments.

Sentri Systems operates on active construction sites where safety, precision and continuity are critical.

Applications by sector

Metro & Rail Tunnels

Worker tracking and access control across long, segmented tunnel bores, with a focus on safety and zero disruption to the construction schedule.
Road & Highway Tunnels

CCTV and emergency intercom coverage for public-facing tunnel infrastructure, built to critical safety standards.
Utility & Service Tunnels

Biometric access control for confined utility corridors, with no impact on existing services or equipment.
Mining & Underground Excavation

Real-time headcount tracking across evolving excavation fronts, suitable for fast-changing underground environments.
Hydropower & Water Infrastructure

Security systems for underground dam and tunnel works, installed without dismantling existing infrastructure.
Deep Shaft & Foundation Works

Access control for vertical shaft entry points, without disruption to sensitive equipment or precision works.
General Underground Construction

Widely usable across tunnel and underground construction projects, for sites where manual tracking methods fall short.

Not sure what your site needs?

We assess the situation in advance, based on your site layout, workforce size and risk profile.

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Worker badging in with an access credential at a tunnel security checkpoint

Security operator monitoring live CCTV feeds across a tunnel network from a control room

Site PPE and access credential holder ready at a tunnel entrance

Controlled access barrier at a tunnel construction site entrance at night

CCTV footage of workers inside an active tunnel installation

Built on hands-on experience in critical underground environments.

Sentri Systems emerged from practical experience in tunnel construction and underground infrastructure, where safety, preparation and control are not options but absolute requirements.

We approach every installation with the same degree of discipline: minimal disruption, controlled execution and respect for the construction schedule.

Technically substantiated approach, no standard interventions

Clear preparation and controlled execution

Focus on long-term relationships and reliability

This is not off-the-shelf security. Every project is executed as a controlled technical process.

Discuss your installation with a specialist.

Receive a technical proposal tailored to your site, workforce and operational requirements.