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LTL2000 Retrometer


On site quality control of road markings & road surfaces in agreement with CEN specifications

  • Plane & profiled markings
  • Dry & wet surfaces
  • Measurements in full daylight
  • Stray light compensation
  • Measurement geometry corresponding to realistic viewing conditions in night time traffic in agreement with the prEN 1436 "Horizontal Signalization" draft standard
  • Portable, self-contained instrument with reflection standard for on site calibration
  • Direct digital read- out of the coefficient of retroreflected luminance, RL
  • Built-in printer
  • Data storage in internal non-volatile memory
  • RS 232 serial interface for data output, extended control, calibration and diagnostics
  • Carrying case, including calibration standard
  • The LTL2000 Retrometer is a self-contained, portable instrument with built - in facilities, capable to measure accurately and reliably retroreflection properties of road surfaces and road markings (dry and wet) including those with profiled and/or textured surfaces.

    The LTL2000 Retrometer measures the retroreflection (with direct read-out of the coefficient of retroreflected luminance in mcd-m-2 .lx-1) at a simulated distance of 30m, a distance large enough to be relevant for practical driving conditions at night.

    Built-in printer and non-volatile memory provide registration of measurement results and corresponding supplementary data.

    Serial interface RS232 is included for extended control, calibration, and data output.

    The LTL2000 Retrometer is powered by a rechargeable battery with a capacity corresponding to approx. 1000 measurements .

    A mains powered battery charger is supplied as a standard accessory.



    Specifications in agreement with prEN 1436 draft:

    Field of measurement:

    Width 45 mm

    Min. length 200 mm

    Illumination angle to the road. 1.24

    Observation angle to the road 2.29

    Illumination angular spread horizontal 0.33

    Vertical 0.17

    Observation angular spread 0.17

    Equivalent observation distance 30m

    Min. reading ( mcd-m-2 .lx-1) 0

    Max. reading ( mcd-m-2 .lx-1) 2000

    Instrument dimensions:

    Max. length 72cm

    Max. width 21 cm

    Max. height 47 cm

    Weight 12 kg

    Gross weight 22 kg

    Power supply: Internal 12V, 3.5Ah sealed lead-acid battery external charger

    Memory capacity: min. 1000 measurements

    Serial communications: 9600, N, 8, 1 Interface: RS232



    Carrying case

    Base frame

    Reflection standard- calibrated

    Working reflection standard

    Battery charger


    Calibration certificate

    Calibration service