Know Who’s Underground — Now
Near real-time underground personnel visibility where GPS fails. Locate, account for, and respond to people underground when every second counts.
Real-Time Personnel Visibility
Emergency-Ready Intelligence
MHSA Chapter 16.7 Support
Features
GPS-Free Underground Tracking
Accurately tracks personnel underground where satellite-based systems cannot operate.
Near
Real-Time Updates
Personnel locations update within 30 seconds using continuous RF transmissions.
Distress & Emergency Alerts
Distress events from personnel are instantly flagged on the control room interface.
Geo-Fenced Safety Zones
Automatically detects and alerts when personnel enter NO GO, danger, blast, or restricted areas.
Heat Maps & Movement Trails
Visualises congestion, movement patterns, and historical trails for safety analysis and investigations.
CPS Tag Compatibility
Works with existing Schauenburg Collision Prevention System (CPS) tags—no additional personnel tags required.
From daily clearance checks to emergency response,
RTWL provides instant confidence that every person underground can be located and accounted for—without radio delays or manual searching.
Engineering Features
Near real-time location updates
(≤30 seconds)
Tag blink rate:
1–5 seconds with status payload
Typical accuracy:
1–4 m depending on anchor density and line of sight
Directional and omni-directional IP66 anchors
RF Technology:
2.4 GHz Chirp Spread Spectrum
Geo-fenced zones with rule-based alerts
Use Cases
Shaft & Blast Clearance
Verify that no personnel remain in restricted areas before blasting.
Emergency Evacuation
Locate and account for all underground personnel during incidents such as fires, rockfalls, or power failures.
Refuge Bay Mustering
Confirm the presence of personnel in refuge bays during smoke or blackout conditions.
Missing Person Location
Rapidly identify the last known location and movement history of unaccounted personnel.
Technical Specifications
RTWL Tags (CPS & Standalone)
| Specification Parameter | Value / Unit |
|---|---|
| Location Update Rate | ≤ 30 seconds |
| Tag Blink Rate | 1–5 seconds |
| System Accuracy | 1–4 m (depending on anchor density & line of sight) |
| RF Technology | 2.4 GHz Chirp Spread Spectrum |
| Battery Life | > 2 years (typical, configuration dependent) |
| Dimensions | 75 × 53 × 44.5 mm |
| Weight | ±80 g |
| Mounting Options | Cap lamp, PPE, asset mount |
| Status Payload | Battery, distress, operational state |
| Environmental Protection | IP-rated, rugged underground design |
| Intrinsic Safety | Intrinsically Safe options available |
RTWL Anchors (Directional & Omni-Directional)
| Specification Parameter | Value / Unit |
|---|---|
| Detection Range | 100–150 m (Line of Sight) |
| Location Accuracy Contribution | 1–4 m (system dependent) |
| RF Technology | 2.4 GHz Chirp Spread Spectrum |
| Anchor Types | Directional and Omni-directional |
| Power | PoE 802.3af (Max 5 W) |
| Ingress Protection | IP66 |
| Operating Temperature | -40 °C to +85 °C |
| Mounting Options | Roof bolt or surface mount |
| Application | Underground tunnels, intersections, chambers |
Compliance & Certification
Supports MHSA Chapter 16.7 emergency preparedness and response requirements
Intrinsically Safe tag options available
ISO 9001 certified development and manufacturing processes