KRL-420 Rotary Laser level for grading Introduce

The KRL-420 Rotary Laser Level is a professional-grade rotating laser level designed for precision grading, construction, and surveying applications. This advanced horizontal and vertical rotary laser level delivers exceptional accuracy with a self-leveling range of ±5°, making it perfect for slope work, foundation alignment, and site preparation. Its robust 360° rotating beam ensures full coverage on job sites, while a working range of up to 1,200m (with detector) guarantees reliable performance in large-scale outdoor projects.

As a versatile rotary laser level for grading, the KRL-420 features dual-mode functionality, allowing seamless switching between horizontal and vertical leveling. The horizontal and vertical rotary laser level capability makes it ideal for applications such as pipe installation, concrete formwork, and interior finishing. Built with an IP66-rated housing, it withstands harsh job site conditions, including dust, moisture, and vibrations.

The rotating laser level comes in a complete kit, including a heavy-duty tripod, laser detector, remote control, and a rugged carrying case for easy transport. With ±1mm accuracy at 30m and an automatic out-of-level alarm, the KRL-420 ensures efficiency and precision in every task. Whether you’re a contractor, surveyor, or engineer, this rotary laser level for grading is engineered to enhance productivity and deliver professional results.

Model parameter comparison of different rotary laser instruments

Item Number	Beam	Horitonal	Vertical	Top point	Bottom point	Handle	Bubble
KRL-405R	Red Beam	✔				Single handle	1 independent bubble + 1 round bubble
KRL-405G	Green Beam	✔				Single handle	1 independent bubble + 1 round bubble
KRL-410R	Red Beam	✔	✔	✔		Single handle	1 independent bubble + 1 round bubble
KRL-410G	Green Beam	✔	✔	✔		Single handle	1 independent bubble + 1 round bubble
KRL-420G	Green Beam	✔	✔	✔	✔	Double handle	1 independent bubble + 1 round bubble
KRL-420R	Red Beam	✔	✔	✔	✔	Double handle	1 independent bubble + 1 round bubble
KRL-440R	Red Beam	✔	✔	✔	✔	Four Handle	1 independent bubble + 1 round bubble
KRL-440G	Green Beam	✔	✔	✔	✔	Four Handle	1 independent bubble + 1 round bubble
KRL-540G	Green Beam	✔	✔	3 independent long blisters		Four Handle	3 independent long blisters
KRL-540R	Red Beam	✔	✔	3 independent long blisters		Four Handle	3 independent long blisters
KRL-640R	Red Beam	✔	✔	3 independent long blisters		Four Handle	3 independent long blisters
KRL-640G	Green Beam	✔	✔	3 independent long blisters		Four Handle	3 independent long blisters

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1.High-Precision Laser Technology for Superior Visibility

The KRL-420HVR features a bright red laser (635nm, 30mw), while the KRL-420HVG offers an even brighter green laser (515nm, 30mw), ensuring clear visibility in both indoor and outdoor environments.

KRL-420 rotary laser level for grading With an upper dot laser, this auto-aligning rotary laser provides additional reference points for vertical alignment, enhancing versatility in complex projects.

2.Advanced Auto-Aligning Electronic Leveling System

Equipped with 1 gyroscope + 1 dual-axis electronic sensor, the KRL-420 achieves fast and precise self-leveling within ±5°, with an industry-leading accuracy of ±0.5mm/10m.

The auto-aligning rotary laser supports two-way tilt adjustment (±10%), allowing for precise slope grading via the included RC100 remote control (150m range).

KRL-420 Rotary Laser

3.Adjustable Rotation Speed & Multi-Scan Modes

The permanent magnet brushless hollow motor enables variable rotation speeds (0/300/600/1000/1500 RPM), optimizing visibility for different applications.

Multiple area scan modes (15°/45°/90°/180°) provide flexibility, making this multi-functional rotary laser ideal for everything from interior finishing to large-scale excavation.

4.Long-Lasting Battery & Extreme Durability

Powered by a replaceable lithium battery, the rotary laser level for grading delivers 15-20 hours of continuous operation, with optional extended batteries available for all-day use.

Built for tough conditions, it boasts an IP65 protection rating and operates in extreme temperatures (-20℃ to +50℃), ensuring reliability in any environment.

5.Smart Remote Control & App Integration

The 12-key remote control synchronizes seamlessly with the 12-key main unit, enabling full functionality from up to 150m away.

App-based calibration simplifies setup and maintenance, enhancing efficiency on the job site.

KRL-420 rotary laser level for grading Specifications

Laser type	KRL-420HVR	KRL-420HVG
Laser type/wavelength	Red laser (635nm-30mw)Upper Dot	Green laser (515nm-30mw)Upper Dot
Leveling way	Electronic leveling (1 gyroscope + 1dual axis electronic sensor)
Leveling range	±5°
Leveling accuracy	±0.5mm/10m
Working dia (UsingLP500)	≥1000m
Working dia (UsingLP700)	≥800m
Working temperature	-20℃～+50℃
Laser rotation speed	0/300/600/1000/1500rpm (Permanent magnet brushless hollow motor)
Area scan	15°/45°/90°/180°
Tilt setting	Two-way
Slope operation	Use the RC100 remote control
Main unit operation	12 keys /5 lights (Sync with remote control signal)
Remote control operation	12 keys /5 lights（Synchronize with host signals Remote control distance ≥150m)
Power supply method	Lithium (Single section replaceable) AC direct supply
Lithium working time	15-20H (Longer working time battery for option)
Calibration method	Remote control /APP
Packaging	Plastic box
Size	Length 201 Width 215 Height 232(mm)
Protection grade	IP65
Fall height	1M Main Machine only
Setting slop range	±10%