Catenary Measuring Instrument with reticle optics

This measuring system is the ideal combination of reticle optics and laser distance measuring.


  • Quick and easy application to measure the catenary wire position
  • position determination of the catenary, the static rest position of the contact wire electric railways
  • statically-punctual measurement of the contact wire height above top of the rail catenary stagger measurement (zig-zag run) in relation to the track center
  • further vertical distance measurements (suspension cable, bridge height, crossing power lines)
  • use for erection of catenaries, assembly of and maintenance work on overhead contact lines

Designed for building sites environments

  • target optics with crosshairs for quickly catenary detection in daylight and including bright sunshine
  • non-contact laser distance measurement of catenary height, visible red laser spot on the target surface
  • single or continuous measurements as useful search function and for differentiation of the distances
  • automatic display illumination, LED back lit for target optic, stagger scale illumination
  • special protection against dust and water for use at almost any weather conditions
  • minimal staffing expenses for logistics and measurements
  • without affecting traction power supply through contactless measurements and insulated track contact
  • contactless measurement (optic, laser); therewith no interruption of the current supply during the measurements in the corresponding track section necessary

Flexibly to combine

  • partable (2-parts) measuring bar with carrying bag for easy and protected transport in the car
  • measuring bars for other track gauges or universal for several track gauges from 750 mm to 1676 mm
  • measuring bars with imperial units (ft, in), changeover of units in the measuring instrument
  • measuring device for track elevation
  • catenary lighting device for night or tunnel work
  • charger for rechargeable batteries
  • laser visibility glasses

Measuring Bars

Universal Measuring Bars

partable [mm] gauge track: 750 to 1676 m, mm-scale


non partable [mm]gauge track: 750 to 1676 m, mm-scale


Measuring bars with fixed gauge track width

partable [mm]

gauge track: 1435 mm, mm-scale


partable [inch]

gauge track: 1435 mm, inch-scale


non partable [mm]

gauge track: 1435 mm, mm-scale


non partable [inch]

gauge track: 1435 mm, inch-scale


non partable [mm]

gauge track: 1000 mm, mm-scale


Additional Acessories

LED flashlight for catenary

bracket with LED flashlight and brake


additional measuring device

additional measuring device for track elevation, height adjusment with scale 0 to 200 mm, mounted on a measuring bar

aluminium casealuminium transport case for FM4-LO, acessories and documents99.53717
carrie case for partable measuring bar

padded, two carrying straps, one shoulder strap,
dimensions appr. 105 x 28 x 18 cm


carrie case for narrow gauge measuring bars

padded, two carrying straps, one shoulder strap ,
dimensions appr. 165 x 28 x 18 cm

laser visibility glassesimproves the visibility of the red alser dot99.50968
charger (UC20)input 100-240 V (AC), including four power adapters for worldwide use and two AAA batteries99.74089




Stagger of the overhead contact line

Measuring bar (guide rail) for track gauge [ft/in]1435
Separable (two-part) measuring bar, carrying bagnoyes
Mesuring range left to right / scale value of measuring bar [in]± 1 (1/8)
System measuring accuracy [in]± 1/4
Height of the overhead contact line
Measuring range of the laser [ft]up to 200
Factory setting / optional unit settings [ft]0.00
Measuring accuracy laser / system [in]± 1/16 / ± 1/8
Laser class (international standard IEC60825-1)2
Laser power / wavelenght [mW/nm]< 1 / 635
Direction laser beamvertical
Display [mm]35 x 18, automatically illuminated
Operating modessingle or contnuous measurement
Automatic laser switch off [s]90
Power Supply [V] DC1.51.2
Quantity / type of batteries2 / AAA2 / AAA
Rechargeable batteries, charger incl. 4 diverse plugsneinja
Automatic power switch off [s]180
Operating time / number of measurementsup to 5000up to 4000

LED illumination crosshairs target optics)

LED illumination for stagger measuring edgeyes
LED illumination lighting device for contact wirenoyes
Temperature range operation / storage [°C]-10…+50 / -25…+70
Protection class (DIN EN 60529)IP64
Dimensions / Weights

Dimensions / weight of the measuring instrument [mm / kg]

258 x 108 x 101 / 2.2
Dimensions / weight of the measuring bar [cm / kg]187 x 21 x 14 / 5.2187 x 21 x 14 / 6.0
Dimensions / gross weight of the transport case [cm / kg]54 x 15 x 24 / 5.554 x 15 x 24 / 6.0
Dimensions / gross weight of the carrying bag [cm / kg]-105 x 28 x 18 / 8.0
Dimensions / gross weight of the shipping package [cm / kg]197 x 37 x 37 / 15110 x 37 x 37 / 18