The Spectra Precision LL1505C-28S is a complete, job-ready single-grade rotary laser system engineered for site contractors, concrete crews, and excavation professionals who demand reliable horizontal plane establishment across extended working distances. This turnkey package ships with everything needed to get elevation control running on day one—no sourcing additional components, no delays on the jobsite.
System Overview & Jobsite Applications
Built around the LL1505C self-leveling rotary laser head, this package delivers a working range of up to 2,000 feet in diameter when paired with the included CR700 rod-mounted laser receiver. The self-leveling mechanism automatically compensates for minor setup variations, locking a true horizontal reference plane within seconds of powering on. Whether you are establishing finish grades across a commercial pour, checking elevation consistency on a large excavation, or laying out footings for a residential foundation, the LL1505C provides the accuracy and repeatability that professional crews depend on. Remote operation via the included soft app remote allows a single operator to adjust settings from the rod location without returning to the instrument.
Key Specifications
- Model: Spectra Precision LL1505C-28S
- Laser Class: Class IIIa / Class 3R
- Self-Leveling Range: ±5°
- Accuracy: ±1/16 in. at 100 ft (±1.5 mm at 30 m)
- Working Range: Up to 2,000 ft diameter (with CR700 receiver)
- Rotation Speed: 100, 300, 600 RPM selectable
- IP Rating: IP66 — dust-tight and water-resistant
- Battery Life: Up to 40 hours on D-cell alkaline batteries
- Wavelength: 635 nm visible red beam
What's in the Kit
- Spectra Precision LL1505C self-leveling rotary laser
- CR700 rod-mounted laser receiver with clamp
- Soft app infrared remote control
- Aluminum tripod with quick-release head
- Inch-graduated grade rod (direct read)
- Protective carrying case for transport and storage
- D-cell batteries and operator documentation
Job Applications
Foundation & Footing Layout: Establish a consistent elevation reference across all footing forms before the pour. The LL1505C's 360° horizontal plane ensures every corner of the foundation hits the same benchmark without running a string line.
Concrete Slab Grading: Set screed guides and check slab thickness in real time using the CR700 receiver on the grade rod. The audible and visual grade indicators on the CR700 allow a rod person to locate grade independently while the laser operator monitors rotation from a distance.
Site Excavation & Rough Grade: Monitor cut-and-fill elevations across large open sites. The extended 2,000 ft working diameter keeps the instrument in one position longer, reducing setup moves during mass grading operations.
Drainage & Utility Slope Work: Confirm pipe inverts and drainage channel elevations by reading direct measurements off the inch-graduated grade rod, accelerating inspection and layout workflows without additional conversion steps.
Compatible Accessories
- Spectra CR700 Replacement Receiver
- Spectra RC703 Remote Control Upgrade
- Heavy-Duty Fiberglass Grade Rod
- Laser Level Detector Holder / Rod Clamp
- Replacement Carrying Case for LL1505C
- Aluminum Elevating Tripod — Heavy Duty
Related Guides
- How to Set Up a Rotary Laser Level on a Jobsite
- Single-Grade vs. Dual-Grade Laser Levels: Which Do You Need?
- Using a Laser Receiver for Long-Range Grade Work
- Laser Level Accuracy: Understanding Specs Before You Buy
Frequently Asked Questions
- Does the LL1505C-28S support grade or slope mode?
- No — the LL1505C is a single-grade (horizontal-only) self-leveling laser. It does not offer manual grade or dual-axis slope capability. For grade percentage work, consider the Spectra LL500 or a dual-grade model in the Spectra lineup.
- What is the maximum outdoor working range with the CR700 receiver?
- In typical outdoor conditions with the CR700 rod-mounted receiver, the LL1505C achieves a working diameter of up to 2,000 feet (600 m), making it well-suited for large open sites, parking lots, and grading operations.
- Is this package IP-rated for use in rain or dusty conditions?
- Yes. The LL1505C carries an IP66 rating, meaning it is fully protected against dust ingress and resistant to heavy water spray. It is designed for demanding outdoor construction environments.
- Can one person operate the system solo?
- Yes. The included soft app infrared remote allows the rod person to control laser rotation speed and power from the receiver end, enabling true one-person operation without walking back to the instrument.
Frequently Asked Questions
Does the LL1505C-28S support grade or slope mode?
No — the LL1505C is a single-grade (horizontal-only) self-leveling laser. It does not offer manual grade or dual-axis slope capability. For grade percentage work, consider the Spectra LL500 or a dual-grade model in the Spectra lineup.
What is the maximum outdoor working range with the CR700 receiver?
In typical outdoor conditions with the CR700 rod-mounted receiver, the LL1505C achieves a working diameter of up to 2,000 feet (600 m), making it well-suited for large open sites, parking lots, and grading operations.
Is this package IP-rated for use in rain or dusty conditions?
Yes. The LL1505C carries an IP66 rating, meaning it is fully protected against dust ingress and resistant to heavy water spray. It is designed for demanding outdoor construction environments.
Can one person operate the system solo?
Yes. The included soft app infrared remote allows the rod person to control laser rotation speed and power from the receiver end, enabling true one-person operation without walking back to the instrument.