The Spectra Precision LL300S-CR71 is a complete rotating laser level package built for surveyors, civil contractors, and grading crews who demand precision elevation reference across large job sites. This kit pairs the rugged LL300S self-leveling laser with the versatile CR700 receiver, a tenths-graduated leveling rod, heavy-duty tripod, and a protective carrying case — everything you need to establish accurate grade control from the moment you arrive on site.
Overview & Jobsite Applications
The LL300S delivers a self-leveling horizontal plane accurate to ±1/16 inch at 100 feet, making it a trusted reference for benchmark establishment, as-built surveys, and finish grade verification. The tenths-unit rod graduation aligns with professional survey notation standards, eliminating conversion errors when documenting elevation data or coordinating with engineers. Whether you are working on a commercial pad, utility corridor, or residential subdivision, the LL300S-CR71 package provides the range, accuracy, and field flexibility to keep crews productive and elevation records defensible.
Key Specifications
- Working Range: Up to 2,600 ft diameter (with CR700 receiver)
- Accuracy: ±1/16 in at 100 ft (±1.5 mm at 30 m)
- Self-Leveling Range: ±5° automatic
- Rotation Speed: 150, 300, or 600 RPM selectable
- Laser Class: Class IIIa / Class 3R (635 nm visible red)
- Battery Life: Up to 100 hours on 4 D-cell batteries
- IP Rating: IP66 dust and water ingress protection
- Operating Temperature: -20°C to +50°C (-4°F to +122°F)
- Rod Graduation: Tenths (0.1 ft) increments for survey-standard documentation
What's in the Kit
- Spectra Precision LL300S self-leveling rotary laser with out-of-level alarm
- CR700 Receiver — supports both continuous laser line and rotating beam detection; includes clamp mount
- Tenths-Graduated Leveling Rod — matches professional survey notation for direct field documentation
- Heavy-Duty Tripod — stable aluminum construction with wide-stance legs for uneven terrain
- Protective Carrying Case — foam-lined, latching case keeps all components organized and protected during transport
- 4 D-cell batteries included for immediate operation
- Target card and operator's manual
Job Applications
Benchmark & Elevation Control: Set a reliable elevation reference across large commercial or civil sites. The LL300S long working range allows a single instrument setup to serve multiple crews simultaneously, reducing instrument moves and saving time.
Finish Grade Verification: Confirm subgrade and finish surface elevations against design documents. Tenths-rod readings integrate directly with survey field notes and grading reports without unit conversion.
Utility & Pipeline Slope Control: Use the CR700 receiver mounted to a grade rod for trench bottom checks on storm drain, sewer, and water main installations where consistent invert elevations are critical.
As-Built Survey Documentation: Record existing ground elevations before and after earthwork operations. The LL300S accuracy and tenths notation make field data ready for direct use in CAD and survey software.
Compatible Accessories
- Spectra Precision CR700 Replacement Receiver
- Spectra Precision HL760 Laser Receiver (Long Range)
- Aluminum Grade Rod Extensions
- RC601 Remote Control for LL300S
- Replacement D-Cell Battery Pack
- Universal Laser Detector Clamp Mount
Related Guides
- How to Set Up a Rotating Laser Level for Grade Control
- Reading a Tenths Rod: A Field Guide for Contractors
- Rotating Laser vs. Line Laser: Choosing the Right Tool
- Spectra Precision LL300S Calibration & Maintenance Tips
Frequently Asked Questions
- What is the working range of the LL300S-CR71 package?
- With the included CR700 receiver, the LL300S provides a working diameter of up to 2,600 feet, making it suitable for large civil and commercial job sites where a single setup must serve multiple work zones.
- Why does this package include a tenths-graduated rod instead of a standard foot rod?
- Tenths notation (0.1 ft increments) is the standard used in professional surveying and civil engineering documentation. Using a tenths rod eliminates the need to convert between fractional inches and decimal feet, reducing errors when transferring field data to design drawings or survey reports.
- Can the CR700 receiver be used with other rotating laser brands?
- The CR700 is designed and optimized for use with Spectra Precision rotating lasers. While it may detect signals from some other 635 nm red-beam lasers, full compatibility and accuracy performance is only guaranteed with Spectra Precision instruments.
- Is the LL300S suitable for outdoor use in wet conditions?
- Yes. The LL300S carries an IP66 rating, meaning it is fully protected against dust ingress and high-pressure water jets. It can operate reliably in rain and dusty site conditions, and its operating temperature range of -4°F to +122°F covers most seasonal job site environments.
Frequently Asked Questions
What is the working range of the LL300S-CR71 package?
With the included CR700 receiver, the LL300S provides a working diameter of up to 2,600 feet, making it suitable for large civil and commercial job sites where a single setup must serve multiple work zones.
Why does this package include a tenths-graduated rod instead of a standard foot rod?
Tenths notation (0.1 ft increments) is the standard used in professional surveying and civil engineering documentation. Using a tenths rod eliminates the need to convert between fractional inches and decimal feet, reducing errors when transferring field data to design drawings or survey reports.
Can the CR700 receiver be used with other rotating laser brands?
The CR700 is designed and optimized for use with Spectra Precision rotating lasers. While it may detect signals from some other 635 nm red-beam lasers, full compatibility and accuracy performance is only guaranteed with Spectra Precision instruments.
Is the LL300S suitable for outdoor use in wet conditions?
Yes. The LL300S carries an IP66 rating, meaning it is fully protected against dust ingress and high-pressure water jets. It can operate reliably in rain and dusty site conditions, and its operating temperature range of -4°F to +122°F covers most seasonal job site environments.
