KRAB Heavy (84-09SA)
Model: KRAB 84-09SA Heavy-Duty
Heavy-duty trolley for track geometry and rail profile measurement, towed behind a railway vehicle at up to 25 km/h.
The only KRAB designed for towing behind railway vehicles — maximum stability and full add-on compatibility for comprehensive track condition inspection.
Measurement Tasks
At a glance
KRAB Heavy (84-09SA) in Detail
Overview & Specifications
Why Choose KRAB Heavy (84-09SA)
- Towing behind a railway vehicle, measuring at up to 25 km/h.
- Add-ons such as LPS (Laser Profile Scanner) or rail profile cameras for track clearance and rail wear evaluation.
- Maximum stability and anti-derailment mechanism.
- Suitable for long-distance measurement campaigns.
Designed for towing behind railway vehicles, with manual operation capability for station tracks and complex areas. Approved by ČD (Czech Railways), RENFE (Spain), and DB (Germany).
- Towing + manual operation — tow at speed on main lines, push manually in stations
- Failsafe brake system — automatic activation on wheel loss or derailment
- Proximity sensors (3×) — rail contact monitoring with visual and acoustic warnings
- Automatic tow bar decoupling — safety disconnect on derailment detection
- Foldable — compact for transport despite its robust construction
Technical Specifications EN 13848-2 EN 13848-4
Weight
110 kg
Wheel Diameter
180 mm (enlarged for obstacle crossing)
Battery
Removable Li-Ion, 8 hours
Operating Temperature
−20 to +55°C
Scanning Interval
0.25 m (adjustable)
Memory Capacity
~1000 km of data
What It Measures
Base configuration without add-ons; LPS and rail profile cameras extend the list
| Parameter | Accuracy |
|---|---|
| Gauge | ±0.4 mm |
| Alignment (horizontal) | ±0.8 mm (1–25 m) |
| Top (vertical) | ±0.5 mm (1–25 m) |
| Cant / Cross Level | ±1.0 mm (range ±225 mm) |
| Twist | Selectable chord length |
| Radius | 1000/R calculation |
| Distance | 1.0 m/km |
| Speed | Continuous |
Compatible Add-ons
LPS - Laser Profile Scanner
Clearance profile measurement, breach detection, overhead line equipment and platform evaluation, infrastructure scanning
Rail Profile Measurement
3D cameras scan the rail head without contact at a configurable step (1 m is usual), on one rail or both. Rail head wear and the profile shape are calculated and shown in real time; equivalent conicity according to EN 15302 comes from the same profiles
Track Cameras
KrabCamera or an IP camera photographs the track, rails, sleepers and surroundings at a set step (typically 1 to 10 m), each picture tied to the km position and viewed in KRAB 11 with the measured data. A 360° camera captures the full view around the trolley
IMU - Inertial Measuring Unit
Gyroscopes and accelerometers measure alignment, top and cant continuously and in real time; the data gives real geometry, chord geometry and the D1, D2 and D3 wavebands
Differential GNSS Receiver
A high-precision satellite receiver with RTK corrections (GPS, GLONASS, Galileo, BeiDou) over mobile broadband; the precise position is logged with the measurement
Compatible Software
Fully integrated with the KZV software ecosystem
Download Datasheet
Full technical specifications as a PDF:
Videos
KRAB System Live Rail Test
The KRAB trolley during a live rail test, measuring track geometry and rail profiles in real field conditions.
KRAB Heavy in Operation
KRAB Heavy (84-09SA) coupled to a rail vehicle for pushed or towed measurement of main-line track geometry, with its derailment prevention and protection systems in place.
Interested in KRAB Heavy (84-09SA)?
Contact us for detailed specifications, pricing, and delivery information