# Spectra Precision LR50W-2 Wireless Capable Laser Machine Display Receiver (NiMH)
Overview
The Spectra Precision LR50W-2 is a wireless-capable laser machine display receiver engineered for professional contractors and machine operators on large-scale construction sites. Built to integrate seamlessly with laser-guided grading systems, this advanced receiver delivers real-time elevation accuracy with a large, easy-to-read LCD display that shows grade position at a glance—even in bright sunlight. Designed for mounting on dozers, excavators, scrapers, and motor graders, the LR50W-2 combines wireless operation with NiMH rechargeable battery technology for all-day performance. The receiver captures rotating laser signals and translates them into precise grade information, eliminating guesswork and reducing material waste on earthmoving projects. With wireless capability up to 984 feet (300m), the LR50W-2 streamlines machine control workflows by transmitting data to the HL700 or HL750 handheld displays, allowing operators and grade checkers to monitor elevation without leaving the cab or walking to the machine. Its rugged IP67-rated housing withstands dust, water, vibration, and impacts common on demanding job sites.Key Specifications
- Display Type: High-contrast LCD with on-grade, above-grade, and below-grade indicators
- Receiver Range: Up to 262 feet (80m) diameter working range with compatible rotating lasers
- Wireless Range: Up to 984 feet (300m) line-of-sight to HL700/HL750 handhelds
- Accuracy: ±1/16 inch (±1.5mm) in optimal conditions
- Detection Window: 4.7 inches (120mm) height
- Battery: Rechargeable NiMH battery pack with 40+ hour runtime
- Charging Time: Approximately 4 hours to full charge
- Operating Temperature: -4°F to 122°F (-20°C to 50°C)
- Durability Rating: IP67 (dust-tight and waterproof to 1 meter)
- Mounting: Universal rod clamp fits 1-inch to 1.5-inch grade rods and masts
- Weight: 2.2 lbs (1.0 kg) with battery
- Dimensions: 10.6 x 5.1 x 3.1 inches (270 x 130 x 80mm)
- Warranty: 3-year manufacturer's warranty
What's in the Kit
- LR50W-2 Wireless Laser Receiver with integrated display
- Rechargeable NiMH battery pack (installed)
- 110V AC battery charger with regional plug adapter
- Universal rod clamp mounting bracket
- Protective carrying case
- Quick start guide and operation manual
- Calibration certificate
Job Applications
- Site Grading and Excavation: Achieve precise cut-and-fill operations on commercial and residential developments by providing real-time elevation feedback to dozer and excavator operators, reducing over-excavation and material costs by up to 30%.
- Road Construction and Highway Work: Maintain exact subgrade and base elevations across miles of roadway with wireless monitoring capability that lets grade checkers verify elevations from safe distances away from active lanes and heavy equipment.
- Agricultural Land Leveling: Create uniform field slopes for optimal drainage and irrigation efficiency on large agricultural parcels, where the wireless range enables monitoring across expansive areas without constant repositioning.
- Sports Field and Golf Course Construction: Build precise drainage slopes and playing surface contours to exacting specifications, with the high-contrast display allowing operators to make micro-adjustments for premium finish grades.
- Utility Trenching and Pipeline Installation: Establish consistent trench depths and grades for water, sewer, and stormwater systems, with the receiver's compact design fitting easily on trencher booms and the wireless capability reducing the need for grade checkers in trenches.
- Mining and Quarry Operations: Control haul road grades and bench elevations in demanding environments where the IP67 rating protects against dust infiltration and the NiMH battery delivers reliable performance through extended shifts.
Compatible Accessories
- Spectra Precision HL700 Wireless Handheld Display
- Spectra Precision HL750 Handheld Laser Receiver
- LR50W Replacement NiMH Battery Pack
- LR50 Series AC Battery Charger
- Universal Laser Receiver Rod Clamps
- Spectra Precision LL500 Rotating Laser Level
- Spectra GL700 Series Dual Grade Lasers
- Heavy-Duty Machine Control Grade Rods
Related Guides
- How to Set Up Laser Receivers for Machine Grading
- Understanding Laser Level Accuracy for Earthwork Projects
- Wireless vs. Wired Machine Control Systems: Comparison Guide
- NiMH Battery Care and Maintenance for Construction Equipment
FAQ
- What rotating lasers is the LR50W-2 compatible with?
- The LR50W-2 works with all Spectra Precision rotating lasers including the LL300, LL400, LL500, GL600, and GL700 series, as well as most other brands' single-slope and dual-slope rotating lasers operating on standard frequencies. For best performance and full wireless functionality, pair with Spectra lasers that support wireless communication protocols.
- How does the wireless capability work and what range can I expect?
- The LR50W-2 uses radio frequency transmission to send elevation data to compatible HL700 or HL750 handheld displays up to 984 feet (300m) away in open line-of-sight conditions. This allows grade checkers and supervisors to monitor machine position remotely without approaching equipment. Actual range may be reduced by obstacles, interference, or terrain—typical working range on most sites is 500-700 feet.
- How long does the NiMH battery last on a single charge?
- Under normal operating conditions, the rechargeable NiMH battery provides 40+ hours of continuous use, easily covering multiple work days. Battery life varies based on display brightness settings, wireless transmission frequency, and temperature conditions. Cold weather (below 32°F) may reduce runtime by 20-30%. A full recharge takes approximately 4 hours using the included charger.
- Can I use this receiver for both single-grade and dual-grade laser systems?
- The LR50W-2 is designed primarily for single-grade (rotating laser) applications, displaying elevation information from one laser plane. For dual-grade work requiring simultaneous cross-slope and main-fall control (common on motor graders), consider the Spectra LR50WG dual-grade receiver or pair two LR50W-2 units on perpendicular masts. Consult your laser specifications to match receiver capabilities with your grading requirements.
