Spectra Precision LR-50W


The easy-to-use LR50 features versatile 360-degree laser reception and works with all types of rotating lasers on all types of machinery for fast, no-hassle setup. Rugged and waterproof, the LR50 receiver withstands all weather environments. Internal isolating shock mounts protect the electronics.


  • Built-in blade tilt indicator helps the operators keep the blade level for increased accuracy and productivity
  • Center On-grade provides an equal amount of grade information above and below on-grade. Use on dozers, graders, scrapers and box blades
  • Offset on-grade for productive excavation provides additional above grade information for less undercuts
  • Built-in plumb indicator for fast, accurate grade checking for excavators and backhoe’s
  • Up to six channels of grade information plus directional out-of-laser beam indicators
  • Three selectable accuracies meet job tolerances from rough grading to final finishing for maximum flexibility
  • Adjustable, ultra-bright LED with green on-grade display provides user selectable, easy-to-see display to match ambient lighting conditions
  • LR50W Used with Spectra Precision RD20 Wireless Remote Display
Receiver is designed to be used as a stand-alone display receiver on grading and excavating equipment including: dozers, excavators, backhoes, scrapers, and box blades


Number of Display Channels5-Channel Display 6-Channel Display in excavating mode
Accuracy: Center on grade mode (grading)Fine: 5 mm (0.20 in) Standard: 10 mm (0.40 in) Wide: 20 mm (0.80 in)
Accuracy: offset on grade mode (excavating)Fine: 12 mm (0.50 in) Standard: 25 mm (1.0 in) Wide: 50 mm (2.0 in)
Blade-Tilt Accuracy± 0.5°, ± 1.5°, ± 2.5°
Plumb-Swing Accuracy± 0.5°, ± 1.5°, ± 2.5°
Vertical Reception171 mm (6.75 in)
LED Battery Life
Alkaline Bright/Dim45 / 60 hrs
Wireless with remote on15 / 20 hrs
Ni-MH Bright/Dim30 / 45 hrs
Wireless with remote on15 / 20 hrs
Receiver Warranty2 Years