GRI SG-2 ShockTec Vibration Sensor

GRI SG-2 ShockTec Vibration Sensor

Overview

The GRI SG-2 is a specialized vibration detection sensor engineered for perimeter security applications. This ShockTec-series instrument monitors ground vibration and shock events across fence lines, building perimeters, and critical infrastructure boundaries. The SG-2 captures seismic disturbances with high sensitivity, translating mechanical vibration into reliable alarm signals for integration into comprehensive security monitoring systems. Designed for outdoor deployment and harsh environmental conditions, the SG-2 sensor provides continuous perimeter coverage with minimal false-alarm rates when properly calibrated.

Key Features

• ShockTec Vibration Detection Technology: Purpose-built sensor array detects ground-coupled vibrations from climbing, cutting, or vehicular impact against perimeter infrastructure
• High-Sensitivity Seismic Monitoring: Captures low-frequency vibration events (typically 5–500 Hz range) characteristic of unauthorized fence or barrier breach attempts
• Environmental Durability: Sealed construction rated for outdoor temperature extremes, moisture exposure, and UV radiation typical of fence-line and building-perimeter installations
• Adjustable Sensitivity Threshold: Field-configurable alarm trigger levels accommodate site-specific ground conditions, soil composition, and ambient vibration baseline
• Low Power Consumption: Extended battery or 12V DC power operation reduces infrastructure wiring requirements for remote perimeter segments
• Relay Alarm Output: Contact-closure signal compatible with standard security control panels, CCTV trigger systems, and multi-zone monitoring platforms
• Compact Mounting Profile: Weatherproof enclosure designed for pole, post, or direct ground installation without requiring bulky external housings
• Tamper Detection Circuit: Integrated anti-tamper monitoring alerts to sensor removal or physical interference attempts

Integration & Compatibility

The SG-2 sensor outputs a standard dry-contact relay signal, making it compatible with industry-standard intrusion control panels, multiplexers, and hybrid security management platforms. The sensor operates independently without requiring complex software integration or IP networking, allowing rapid deployment alongside legacy access control and CCTV systems. When configured in multi-sensor arrays along fence perimeters or building boundaries, the SG-2 can feed zone-based alarm logic directly to dispatch consoles or automated response systems.

Typical Deployment Scenarios

The GRI SG-2 is widely installed on perimeter fencing, gate frames, and structural barriers at high-security facilities including government installations, utilities, data centers, and critical infrastructure sites. The sensor's ability to detect cutting or climbing activity before visual breach occurs makes it valuable for standoff detection applications. Multi-point sensor networks create graduated alarm zones that help security personnel identify breach location and direction of approach. The SG-2 pairs effectively with exterior lighting control, camera pan/tilt triggers, and armed response protocols.

Jerry Tildsen

I've specified the GRI SG-2 on several perimeter security upgrades over the past two years, particularly for sites where traditional motion detection or pressure-sensitive cable systems were generating excessive false alarms. The SG-2's vibration-based approach fundamentally changes how you detect unauthorized fence tampering—it's looking for the mechanical signature of cutting or climbing activity, not just movement or weight distribution changes.

Technical Highlights:

• Seismic Sensitivity: The SG-2 responds to vibration frequencies associated with bolt cutters, pry bars, and climbing activity while rejecting wind-induced fence flex and light animal contact
• Relay-Based Output: Standard dry-contact alarm signal integrates with any control panel that accepts NO/NC contacts, no special cards or gateways required

Deployment Considerations:

• Soil composition and ground coupling directly affect sensitivity—loose, sandy soil requires different calibration than compacted clay or asphalt perimeters. Site-specific threshold tuning during commissioning is critical to minimize nuisance alarms
• Multiple sensors should be wired to separate zones on your control panel so you can track breach location and vector; a single perimeter-wide zone defeats the detection value

The SG-2 works best as part of a layered perimeter strategy—combine it with clear-zone lighting, CCTV, and access control checkpoints. It won't stop a determined breach, but it gives your team detection lead time and breach location intelligence that motion sensors alone cannot provide.