Leica NA724 Auto Level 24X Magnification

Overview

The Spectra Precision HV302GC-17 combines proven laser technology with a practical field package for contractors managing multi-phase construction work. This model handles both horizontal and vertical reference requirements, eliminating the need for separate tools on tight schedules. The HV302GC-17 delivers dual-slope capability in one axis while maintaining single-slope functionality in the perpendicular direction—a configuration that addresses common grading and foundation scenarios without overcomplicating the setup process.

This complete package includes the RC803 remote control for operational adjustments from distance, the HL760 digital receiver for precision detection in bright conditions, a telescoping grade rod for elevation transfer, and a heavy-duty tripod for stable mounting. Whether you're establishing level lines for interior framing, setting drainage grades around a building perimeter, or transferring elevation benchmarks across a site, this system provides the range and accuracy required for professional construction applications.

Spectra Precision engineered the HV302 series for daily job-site use, with IP66 environmental protection against dust and water ingress. The self-leveling mechanism compensates for minor setup variations, while the manual mode supports steep-grade work beyond the automatic range. For general contractors, site developers, and concrete crews working on projects where horizontal and vertical references change throughout the day, this package delivers the versatility needed without carrying multiple laser units.

Key Specifications

• Accuracy: ±1/16" at 100 feet (±1.5 mm at 30 m) for horizontal leveling
• Self-Leveling Range: ±5 degrees automatic compensation with out-of-level alert
• Working Diameter: Up to 2,600 feet (800 m) with receiver in optimal conditions
• Rotation Speed: 0, 150, 300, 600, and 1200 RPM selectable scan speeds
• Beam Type: Class 3R visible red laser diode at 635 nm wavelength
• Power Options: Rechargeable lithium-ion battery with 40+ hour runtime at moderate speeds
• Environmental Rating: IP66 dust-tight and protected against powerful water jets
• Operating Temperature: -4°F to 122°F (-20°C to 50°C) for year-round field use
• Receiver Accuracy: HL760 detects to ±1/16" (±1.5 mm) digital resolution with LCD display
• Dual-Slope Capability: Programmable grade matching in one axis via remote control

What's in the Kit

• HV302GC-17 Laser Level: Main rotating laser unit with horizontal and vertical operation modes
• RC803 Remote Control: Wireless operation of laser functions, slope adjustment, and rotation speed from up to 300 feet away
• HL760 Digital Receiver: Rod-mountable detector with large LCD, audio alerts, and millimeter readout for precise elevation work
• Telescoping Grade Rod: Extends to multiple heights for vertical measurements and benchmark transfers
• Heavy-Duty Tripod: Adjustable-leg mounting platform with quick-release hardware for laser attachment
• Rechargeable Battery Pack: High-capacity lithium-ion power source with charger included
• Hard-Shell Carrying Case: Protective storage for laser transmitter with foam interior compartments
• Operator Manual: Setup instructions, calibration procedures, and troubleshooting reference

Job Applications

• Foundation and Slab Layout: Establish consistent elevation references across formwork for level concrete pours and verify screed height during finishing. The horizontal plane ensures uniform depth control while the vertical beam supports square wall alignments at corners.
• Interior Framing and Drywall: Project level lines around room perimeters for ceiling grid installation, chair rail placement, and partition wall alignment. The rotating beam eliminates manual chalk-line snapping and provides a continuous reference that multiple crew members can use simultaneously.
• Drainage and Site Grading: Program precise slope percentages for swale construction, parking lot drainage, and trench excavation. The dual-slope capability allows you to match existing grades or create specific fall rates for stormwater management without constant grade-checker calculations.
• Plumbing and Mechanical Rough-In: Transfer elevation benchmarks to different floor levels and establish consistent height references for pipe hanger installation. The vertical beam supports plumb alignment for shaft walls and service chases in multi-story construction.
• Exterior Fascia and Deck Installation: Maintain level reference lines for ledger board mounting, beam placement, and railing installation where traditional leveling methods become cumbersome over extended spans. The long working diameter covers large deck footprints from a single setup position.
• Concrete Flatwork and Curbing: Set screed rails at accurate elevations for sidewalk pours and verify curb heights during installation. The receiver's digital display shows exact position relative to grade, reducing rework from elevation errors on projects with tight tolerance requirements.

Compatible Accessories

• RC803G Machine-Mount Remote: Upgraded remote control with grade-matching feature for dozer and scraper applications requiring automated blade control
• HL750 Economy Receiver: Simplified detector without digital display for basic cut/fill indication on budget-conscious projects
• HR320 Receiver: Compact rod-mountable detector with 4-inch detection window and basic LED indicators
• Elevating Tripod: Extended-height mounting system for work over obstacles or enhanced visibility in congested site conditions
• Wall Mount Bracket: Magnetic and adjustable hardware for attaching laser to steel columns or concrete forms
• Laser Target Plate: High-visibility reference plate for visible beam positioning at long distances or in bright sunlight
• Additional Battery Packs: Extra rechargeable batteries for extended runtime on multi-shift operations

Related Guides

• How to Choose the Right Construction Laser Level for Your Application
• Laser Level Calibration and Field Maintenance Procedures
• Site Grading Techniques Using Slope-Capable Rotating Lasers
• Elevation Transfer Methods for Multi-Story Construction Projects

FAQ

What's the difference between horizontal and vertical modes on this laser?

Horizontal mode projects a level plane parallel to the ground—ideal for elevation references, ceiling heights, and foundation work. Vertical mode rotates the beam in a plumb plane perpendicular to the ground, useful for wall alignment, column plumb checks, and transferring points between floor levels. The HV302GC-17 switches between these modes without requiring separate laser units.

Can I use this laser outdoors in full sunlight?

Yes, the included HL760 receiver detects the laser beam in bright outdoor conditions where the visible beam becomes difficult to see with the naked eye. The receiver mounts on the grade rod and provides audio and visual confirmation when positioned on the laser plane. Detection range extends up to 2,600 feet diameter depending on ambient light and atmospheric conditions.

How does the dual-slope feature work and when would I need it?

Dual-slope allows you to program a grade percentage in one direction while maintaining the ability to set a different (or zero) grade in the perpendicular axis. This is valuable for drainage work where you need fall in one direction but level in the cross-slope, or for matching existing site conditions without complex manual calculations. You set the grade percentage via the RC803 remote control.

What maintenance does this laser require to maintain accuracy?

Regular calibration checks ensure the laser maintains factory accuracy specifications—Spectra recommends verification every three to six months depending on use intensity and job-site handling. The unit should be stored in its protective case when not in use, and the battery should be recharged before complete depletion to maximize lifespan. Keep the rotating head and optical window clean from dust and debris. Professional recalibration services are available if the unit becomes out of specification from impacts or rough handling.