Stability monitor
Leader SENTRY B1

Firefighter and USAR applications

Leader SENTRY WIRELESS laser allows the rescuer to monitor risky unstable structures during fire or rescue first responses, like heavy rescue road accident, trench rescue, land slide, building collapse, rescue-clearance operation, etc…

Wireless connection

The Single laser can be paired with an optional remote control allowing easy management of all settings at 100m distance. This option avoids going back and forth to the laser.

Accurate for optimal safety

The Leader SENTRY WIRELESS detects a movement of 1 mm at a distance of 50 m. A telescopic sight accurately helps targeting the unstable object that must be secured.


Multiple maximum movement thresholds (from 2 to 100 mm) can be selected. When a movement is sensed that exceeds the selected threshold, the sound alarm is triggered (105 dB) together with powerful 360° flashlights.
It continuously monitors detected movements and displays changes for real-time awareness.
Product features
Technical sheet


Leader SENTRY is a stability monitor that detects the structural movements of an unstable building. Its laser continuously monitors detected movements and displays changes for real-time awareness.

Leader SENTRY can detect a 1 mm structure movement at a distance of 50 m! A telescopic sight helps to point the laser accurately at the targeted unstable structure.

It allows firefighters and USAR teams to be alerted by a visual and audio alarm (105dB) when a structure movement, however small, is detected.


Primary function
Monitors movements of unstabilised and stabilised structures at distance (50m) = far safer
Sentry Single (1 laser head)
Risk during implementation
None as it is done in a chosen safe area and before any risk is taken, monitoring larger structurers and larger areas of work, thus protecting larger numbers of people
Telemeter laser beam
Monitoring method
Monitors and detects movements from 2 mm to 100 mm.
Several thresholds (2, 5, 10, 20, 40, 70, 100 mm)
Live monitoring
Sentry displays distance to target(s) in real time for movement evaluation allowing to choose relevant threshold
Unit calibration in field
1 audible alarm level at 105 dB ensures alarm to be heard or OFF or Mute
Alarm option
Sentry proposes an out put source to plug a remote loud speaker
Flash light
3 powerful LEDs for an about 360° visibility that give working signal or visual alarm
Short-duration interruptions of the beam passing through it (e.g. people, birds etc.) are filtered.
Designed for external positioning during fire and rescue responses
An optional wireless remote control can be paired allowing easy management from the rubble pile at a distance of 100m.
Power supply
4 means:
110/220V 50/60 Hz mains power pack
12-24V cable with vehicule AC adaptor
AAA alkaline cell batteries
External optional rechargeable battery
Running time
By using the external optional rechargeable battery:
45 hrs (1 laser)

By using standard batteries:

8 hrs AAA alkaline cell batteries
IP 55
1 laser head on tripod with integrated control board
24 months


Product reference



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