Spectra Precision LR50 Machine Receiver


Rugged 360-degree Laser Machine Display Receiver with Built-in Blade Tilt and Excavator Boom Plumb Indicator

The Spectra Precision® Laser LR50 Laser Machine 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. 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. The LR50W is designed to be used with the RD20 Wireless Remote Display.

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

The MM-1 quickly attaches to the dipper arms of excavators or backhoes. Strong dual magnet packs will not slip on the machine and are adjustable for quick installation and set-up.
The DM-20 is an easy-to-install rigid mast for grading machines. No welding is required and no drilling/tapping is required for Trimble Ready™ machines.


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Specifications LR50 / LR50W
Number of Display Channels: 5-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 Reception 171 mm (6.75 in)
LED Battery Life: Alkaline Bright/Dim 45 / 60 hrs, Wireless with remote on 20 / 30 hrs, Ni-MH Bright/Dim 30 / 45 hrs, Wireless with remote on 15 / 20 hrs
Receiver Warranty: 2 Years

Download Spectra Precision LR50/LR50W Machine Receiver User Guide
Download Spectra Precision LR50/LR50W Machine Receiver Brochure