Introduction to the KRL-440 Rotary Laser

The KRL-440 Auto-aligning Rotary Laser represents the next generation of precision leveling technology, combining advanced self-leveling capabilities with dual-axis functionality. As a professional-grade horizontal and vertical rotary laser level, this Auto-aligning Rotary Laser instrument delivers exceptional ±3mm accuracy at 30m, making it ideal for demanding construction, grading, and layout applications. The level laser rotary system features a unique auto-compensation mechanism that maintains perfect alignment even on uneven surfaces, significantly reducing setup time and improving job site efficiency.

Our innovative horizontal and vertical rotary laser level offers unmatched versatility with its ability to project both 360° horizontal planes and precise vertical plumb lines simultaneously. The KRL-440 Auto-aligning Rotary Laser’s high-visibility laser beam remains clearly visible up to 150m in daylight conditions, while its extended 800m working range with detector ensures reliable performance on large-scale projects. This level laser rotary solution is particularly valuable for applications requiring both flatness and plumb references, such as structural steel erection, concrete formwork, and interior partitioning.

The KRL-440 Auto-aligning Rotary Laser comes complete with a rugged IP66-rated housing that withstands harsh job site conditions, including dust, water exposure, and accidental drops. The system includes our proprietary SmartRemote™ controller, allowing single-person operation from distances up to 100m. As a true horizontal and vertical rotary laser level, it features intuitive slope functionality with ±10° adjustability for precise grading applications. Contractors will appreciate the vibration-resistant design and extended 40-hour battery life of this professional level laser rotary system, which maintains consistent performance throughout the longest work shifts.

The KRL-440 Rotary Laser is ideal for a variety of applications, including grading, excavation, and foundation laying. Its high precision and extensive working range make it suitable for both indoor and outdoor use, making it a valuable tool for contractors, surveyors, and builders alike.

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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The KRL-440HVR emits a red laser at a wavelength of 635nm, while the KRL-440HVG utilizes a green laser at 515nm. Both models deliver a powerful output of 30mW and provide upper and lower dot projections. The green laser is particularly beneficial for outdoor use, offering enhanced visibility in bright conditions, thereby making the KRL-440 an efficient level laser rotary for various grading tasks.

KRL-440 Auto-aligning Rotary Laser Equipped with electronic leveling technology, the KRL-440 features a gyroscope and dual-axis electronic sensors. This setup ensures a leveling range of ±5° with an impressive accuracy of ±0.5mm over 10 meters. Such precision makes the KRL-440 Auto-aligning Rotary Laser a reliable choice for professionals who demand the highest quality in their projects, whether for setting foundations or aligning structures.

KRL-440 Rotary Laser

The KRL-440 Rotary Laser boasts remarkable working diameters, achieving distances of over 1000 meters when used with the LP500 receiver and up to 800 meters with the LP700. This extensive reach is essential for large-scale projects, allowing for efficient leveling across expansive areas.

This rotary laser measurement tool offers adjustable rotation speeds of 0, 300, 600, 1000, and 1500 RPM, facilitated by a permanent magnet brushless hollow motor. Additionally, the area scan features—15°, 45°, 90°, and 180°—allow users to customize the laser beam’s coverage according to specific project requirements, enhancing the tool’s versatility.

The KRL-440 is designed for ease of use, featuring a simple interface with 12 keys and 5 indicator lights for the main unit, which synchronizes with the remote control. The RC100 remote enables slope operations from a distance of up to 150 meters, making adjustments straightforward and efficient. Calibration can be performed via remote control or a dedicated app, further simplifying the operational process.

This rotary laser is built to withstand harsh conditions, with an IP65 rating that ensures protection against dust and water. The lithium battery provides a working time of 15-20 hours, with options for extended battery life, ensuring that the KRL-440 remains operational throughout long workdays.

KRL-440 Auto-aligning Rotary Laser Specifications

Laser type	KRL-440HVR	KRL-440HVG
Laser type/wavelength	Red laser (635nm-30mw)Upper/Lower Dot	Green laser (515nm-30mw)Upper/Lower 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 215 Width 215 Height 232(mm)
Protection grade	IP65
Fall height	1M Main Machine only
Setting slop range	±10%