• ImpactSentinel™ is designed for locations where impact, movement, instability or barrier interaction must be detected quickly. Depending on the site and setup, this can include rockfall, landslide-related movement, debris impact, structural loading and other geohazard-driven events affecting protective systems or exposed infrastructure.

• The W400 sensor combines three detection principles: a 3-axis MEMS accelerometer for impact and vibration, tilt monitoring for movement over time, and a mechanical pull-out mechanism for major barrier events. It also monitors temperature, voltage and RSSI for system health and communication quality.

• The pull-out mechanism provides the direct alarm trigger for significant events affecting the monitored barrier section. The typical pull-out force is 500 N, and the release force can be adjusted by changing the pull-out plate thickness.

Typical programmed acceleration thresholds are:

• 2G for high sensitivity
• 4G for medium sensitivity
• 8G for lower sensitivity in areas with higher background activity

This helps match the sensor behaviour to the site environment.

• A geohazard monitoring system should not rely on one trigger type alone. By combining pull-out, acceleration and tilt, ImpactSentinel™ can detect sudden impacts, mechanical loading and movement over time across posts, nets, braking elements and other monitored components.

• ImpactSentinel™ is designed for real-time alarming within seconds. Depending on the communication path, alert delivery is typically around 2–4 seconds, making it suitable for critical infrastructure where delayed updates are not enough.

• Yes. ImpactSentinel™ settings can support adjustable sampling rates via the sensor or SAM. For example, tilt measurement can run at a slower interval to save battery, then switch to faster sampling during an event. Sensor thresholds can also be changed remotely via SAM.

• The sensor uses a universal mount and can be installed on:

  • posts
  • fence cables
  • brake cables
  • barriers
  • poles
  • ground or boulder posts
  • walls

  This makes the system suitable for both retrofit projects and new installations

Each sensor should be within reliable radio range of a base station or repeater. A recommended RSSI is better than -90 dBm, while values approaching -100 dBm are considered borderline and are not recommended for operational use.

A standard setup includes:

Sensor
Monitors the protected element and sends event and health data.

Data relay
Extends the monitored area where greater range is needed.

Base station
Processes and evaluates incoming data.

End user
Receives alarms and status information.

The base station can send alarms and status information via:

• SMS
• Email
• Dashboard
• existing monitoring software

Communication routes can include GSM,  4G, LAN and optical fibre.

Yes. SAM (Sensor Actor Module) is a tailorable data platform that can be used on its own or interfaced with existing control room or monitoring software. System-level thresholds and alarm logic can also be managed in SAM.

Yes. The ImpactSentinel™ system is designed for demanding outdoor use, with an operating temperature range of -40 to +60°C and a compact 400 g design. ImpactSentinel™ sensors are also described as waterproof, shock resistant and suitable for exposed conditions.

The W400 certification material lists completed compliance work against:

• ETSI EN 300 220-1 V3.1.1
• ETSI EN 300 220-2 V3.1.1
• ETSI EN 301 489-1 V2.2.3
• ETSI EN 301 489-3 V2.3.2

These standards are relevant for radio and EMC compliance.

Monitoring redundancy
More than one sensor can cover the same barrier section.

Network redundancy
Sensors can relay through more than one route.

Communication redundancy
The base station can use more than one communication pathway to reach the end user.

ImpactSentinel™ is designed for low ongoing maintenance. Typical tasks include re-inserting the pull-out pin after an event, battery replacement at end of life, keeping solar panels clear where used, and routine lifecycle replacement of electronic components over time.

A typical commissioning process includes:

• sensor IDs and locations recorded
• sensors securely mounted
• detection cables correctly routed
• communication verified via Telegram or SAM
• RSSI values within recommended range
• SAM configuration completed
• final system test of all sensors

Yes. A key commercial advantage is that the hardware is owned outright. This supports a one purchase, continuous protection model and avoids a subscription-only structure for the core system.

The core ownership model is based on outright hardware purchase, not rented hardware. That means dependable hazard monitoring without subscription fees for the main system.

ImpactSentinel™ can be configured to suit different project requirements, including variations in coverage, site conditions and operational needs. The system is adaptable for both permanent monitoring and smaller or temporary applications.

ImpactSentinel™ can be used across a wide range of applications, including:

Railways
For real-time monitoring of geohazard-related events affecting routes and protective systems.

Roads and highways
For monitoring exposed corridors, roadside barriers and automatic closure systems.

Tunnels and portal zones
For detecting instability, impact events and changes near critical access points.

Hydro sites and utilities
For monitoring exposed assets and perimeter protection.

Remote and isolated infrastructure
For locations where fast warning is needed but access is difficult.

Targeted hazard points
Sensors can also be attached directly to unstable boulders, structures or specific risk areas to detect movement.

ImpactSentinel™ can be expanded with:

• video cameras
• rain sensors
• wind sensors
• light sensors
• sound sensors
• inclinometers
• seismometers
• extensometers

Cameras can be triggered automatically after an event and can also be accessed remotely for inspection.

ImpactSentinel™ combines real-time alarming, multi-variable sensing, W400 configurability, flexible mounting, add-on integration, redundancy and outright ownership in one platform. For operators across transport, infrastructure and high-risk environments, that means faster warning and more practical action when conditions change.