Spectra Precision 640657 GL1425C Dual Grade Automatic Rotary Laser Level Kit

Spectra Precision GL1425C Dual Grade Rotary Laser Level Kit with HL760 Receiver (Part No. 640657)Fully Automatic Self-Leveling | Horizontal, Vertical, and Grade Control | Built-in Bluetooth Control

The Spectra Precision GL1425C is a professional-grade dual slope laser level designed for general contractors, concrete crews, excavators, and layout teams who require reliable, precise, and automated control for horizontal, vertical, and sloped applications. Built tough for harsh jobsite conditions, the GL1425C offers a simplified yet powerful solution with self-leveling capability, Grade Match, and PlaneLok, making it ideal for slab work, grading, form setting, trenching, and vertical alignment jobs.

Equipped with built-in Bluetooth, the GL1425C eliminates the need for a dedicated remote—users can control all major functions using the Spectra Precision Laser Remote App directly from their smartphone. This reduces costs and improves flexibility on-site. With a working range up to 800 metres (2,600 ft) and a grade range of ±15% on both axes, the GL1425C covers most light to medium-duty grading and layout applications without the complexity or cost of larger systems.

Included in this kit is the HL760 digital readout receiver with the C70 clamp and vertical adapter, making it easy to set up for both horizontal plane leveling and vertical plumb applications. The HL760 supports wireless communication with the laser, unlocking automatic Grade Match and PlaneLok functionality for increased accuracy, reduced rework, and faster setup.

Spectra Precision Dual Grade Automatic Rotary Laser Level Kit At a Glance

• Automatic Self-Leveling: Levels automatically in horizontal, vertical, and dual slope modes—saving time and reducing setup errors
• ±15% Dual Grade Capability: Adjustable grade range on both X and Y axes for accurate slope setups in trenching, drainage, and slab work
• Bluetooth Laser App Control: Use your smartphone to control all laser functions—no separate remote required
• Grade Match Function: Automatically finds and sets slope between two unknown points over varying terrain
• PlaneLok Feature: Locks the beam to a set elevation or vertical point to prevent drift caused by weather or jobsite movement
• Drop Tested & Durable: Survives drops of up to 1 m (3 ft) and tripod tip-overs up to 1.5 m (5 ft)
• Height of Instrument Alert: Shuts down beam if the laser is disturbed, preventing errors from movement or knocks
• Rotation Speeds: Choose from 300, 600, or 900 RPM for optimal beam visibility and accuracy across various tasks
• Energy Efficient Power Options: Includes high-capacity NiMH rechargeable battery pack; also compatible with alkaline D-cell batteries
• IP66 Weather and Dust Rated: Built for jobsite conditions—rain, dust, mud, and all

Markets

• General Construction Supports concrete and framing crews with fast layout of slabs, footings, and walls on both residential and commercial builds.
• Excavation and Trenching Dual grade allows slope layout for utility runs, stormwater systems, and accurate trench cutting over long distances.
• Concrete Flatwork and Slabs Reliable horizontal and vertical leveling for formwork, screeds, and slab prep, ensuring accurate pours and proper drainage.
• Interior Construction and Renovation Great for ceiling layout, partition walls, and vertical alignment in large interior spaces like warehouses and offices.
• Municipal and Civil Work Helps city crews install curbs, drainage lines, sidewalks, and road-grade projects with ease and minimal manual calculation.
• Agricultural Construction Used to create drainage grades and prepare land for structures like barns or greenhouses with consistent elevation.
• Landscape Construction Ideal for laying patios, fence lines, garden retaining walls, and grading lawns or pathways for proper water flow.

Built for Contractors Who Need Versatility Without Sacrificing Precision. The GL1425C is designed for crews who need fast setups, consistent grade accuracy, and flexibility across different job types. Whether you’re laying out formwork, grading a pad, or aligning plumbing or steel uprights, the automatic dual grade function allows you to dial in slope quickly. With Grade Match, users can measure unknown slope between two points—without needing drawings or slope calculations—while PlaneLok prevents elevation drift over time due to weather or calibration drift.

From concrete to landscaping and trench work, the GL1425C saves time and labour by reducing layout errors and eliminating repeated checks. The app-based control gives teams the freedom to adjust slope or settings without walking back and forth across the site. Combined with a tough, IP66-rated housing, long battery life, and Spectra’s unmatched 5-Year No-Cost Warranty, this laser is built for real-world jobsite reliability.

Spectra Precision 640657 GL1425C Dual Grade Automatic Rotary Laser Level Kit Features

• Automatic self-leveling – Horizontal, vertical, and grade
• Accuracy 1.5mm @ 30m (1/16 inch @ 100 ft)
• Working range of 800m (2,600 ft) diameter
• Radio communication between the HL760
• CR700 digital receiver and the laser provides automatic Grade Matching and PlaneLok
• Bluetooth connection allows laser control with a smartphone
• Height of Instrument Alert – unit stops rotating when jarred to avoid erroneous readings
• Rotation selection of 300, 600 or 900 RPM
• Extremely durable and portable
• 5 Years warranty

Spectra Precision 640657 GL1425C Dual Grade Automatic Rotary Laser Level Kit Includes

• (1) GL1425C Dual Grade Laser
• (1) HL760 Reciever & Clamp
• (1) Verticle Adapter
• (1) NIMH Battery Pack
• (1) Universal Battery Charger
• (1) Hard Case

Spectra Precision 640657 GL1425C Dual Grade Automatic Rotary Laser Level Kit Specifications

GL1425C Laser

• Leveling Accuracy: ±1.5 mm at 30 m (1/16″ @ 100 ft)
• Grade Range (X & Y): ±15%
• Working Diameter: 800 m (2,600 ft) with receiver
• Rotation Speeds: 300, 600, 900 RPM
• Laser Beam: Red, 600–680 nm
• Laser Class: Class 3A/3R
• Self-Leveling Range: ±5°
• IP Rating: IP66 – dust and water resistant
• Drop Protection: 1 m (3 ft); tripod tip-over to 1.5 m (5 ft)
• Battery Type: NiMH rechargeable or Alkaline D-cell
• Battery Life: Long runtime (varies by mode)
• Operating Temp: -20°C to 50°C (-4°F to 122°F)
• Storage Temp: -20°C to 70°C (-4°F to 158°F)
• Mounting Thread: 5/8 x 11 (horizontal & vertical)
• Warranty: 5-Year No-Cost Warranty

HL760 Receiver

• Display Units: mm, cm, ft, in, fractional inches
• Reception Height: 127 mm (5 inches)
• On-Grade Sensitivities: 0.5 mm to 10 mm; Calibration Mode at 0.1 mm
• Power Source: 2 x AA batteries
• Battery Life: 60+ hours
• Auto Shutoff: After 30 minutes or 24 hours
• Drop Rating: 3 m (10 ft)
• Dust/Water Protection: IP67
• Weight: 0.37 kg (13.1 oz)
• Warranty: 3-Year “No Excuses”

Spectra Precision 640657 GL1425C Dual Grade Automatic Rotary Laser Level Kit Warranty

• Spectra Precision’s 5 Year “No Cost” Warranty

Why Professionals Choose the Spectra Precision GL1425C Dual Grade Automatic Rotary Laser Level Kit

Crews often refer to the GL1425C as the “no-remote laser” thanks to its smartphone app control—a small but powerful feature that speeds up layout and saves costs without sacrificing accuracy. It’s ideal for contractors who want a dual grade laser without the complexity or bulk of high-end models. With Grade Match and PlaneLok, users can keep grade consistent without second-guessing calibration or drift—making it a go-to laser for trenchers, finishers, and general site layout crews.

It’s common to hear users call it a “slope laser,” “excavation laser,” or “grade checker” in real-world use—and those search terms will bring up the GL1425C for good reason. With a long working range, rugged construction, and feature set that competes with higher-tier lasers, the GL1425C balances cost-effectiveness with jobsite reliability. It’s designed for crews who want fewer headaches, faster setups, and fewer do-overs—all backed by Spectra’s 5-year warranty and proven product support.