KRAB S-LIGHT
Model: KRAB S-LIGHT Standard
Lightweight and compact full track geometry trolley. Wide range of accessories. Both vignole and grooved rails. 32 kg, 15 km/h, 8-hour battery.
Lightweight: one or two people lift it onto and off the track. Measures the five basic track geometry parameters (gauge, cant, twist, alignment and top), rail profiles and track clearance. Wide gauge range (760–1676 mm).
Measurement Tasks
At a glance
KRAB S-LIGHT in Detail
Overview & Specifications
Why Choose KRAB S-LIGHT
- One trolley for most networks: 32 kg, 15 km/h, eight hours on one battery, full geometry with every add-on, approved by SNCF.
- Wide gauge range (760–1676 mm) for diverse rail types.
- Steady readings on jointed rails and rough track: the frame is stiffer than KRAB U-LIGHT's, which is why most customers choose S-LIGHT.
- Switch inspection (ASI function) is part of your measurement program.
- Full add-on compatibility (LPS, cameras, rail profiles) with a portable trolley.
Covers all common rail profiles on any gauge from 760 to 1676 mm. Rope & Bowden arresting mechanism for safe frog passage.
- Single-operator capable — 32 kg, foldable for transportation
- Hard-chromium wheel surfaces — durability and accurate contact
- Optional switch measurement features — auxiliary rollers measure tongue width, guard rail groove, wing rail/frog groove, backgauge (±1.0 mm)
- Optional add-ons — quasi-twist on 0.9 m base, track gradient, rail profiles, track clearance
- Approved by SNCF (France) — homologated for the French national network
- Optional corrugation unit — an additional corrugation measuring unit, evaluated in Gekon 11
Technical Specifications EN 13848-1 EN 13848-4
Weight
32 kg (basic), +2.5 kg (twist arm)
Gauge Range
760–1676 mm
Max Speed
~15 km/h
Battery Life
8 hours
Operating Temperature
−5 to +55°C
Scanning Interval
0.25 m (adjustable)
Sensor Resolution
0.1 mm
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 | ±0.45 mm |
| Gauge Variation | ±0.5 mm/2 m |
| Vertical Alignment (Top) | ±0.7 mm (1–25 m) |
| Horizontal Alignment | ±1.0 mm (1–25 m) |
| Cant (absolute) | ±1.0 mm |
| Cant (relative, for twist) | ±0.7 mm |
| Twist | ±0.7/l mm |
| Speed | ±0.3 km/h |
| Track Distance | ±1.0 mm |
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
Corrugation Measuring Unit
A corrugation unit in a box on the measuring triangle arm records the running surface during the geometry run; evaluated in Gekon 11
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
Laser Distance Meter (DIMETIX)
A DIMETIX laser distance meter aimed by hand, with a rotary sensor for the angle, records the distance and height of platform edges, masts, walls and other objects at the km position: single-point clearance checks without a profile scanner
Compatible Software
Fully integrated with the KZV software ecosystem
Download Datasheet
Full technical specifications as a PDF:
Videos
ASI - Automatic Switch Inspection
ASI running an automated geometry and condition check on a switch. Automating the inspection catches faults early and keeps switch maintenance predictable.
Measuring Through a Frog Training
The correct procedure for approaching and crossing a frog with a KRAB trolley, so that the measurement stays uninterrupted and the operator stays safe.
Assembly and Operation of KRAB S-LIGHT
KRAB S-LIGHT on the track: a light trolley one person can lift clear of the rails, measuring track geometry from zero speed with no warm-up.
Interested in KRAB S-LIGHT?
Contact us for detailed specifications, pricing, and delivery information