BOSCH GRL900-20HVK REVOLVE900 Self-Leveling Horizontal / Vertical Rotary Laser Package

Professional Rotary Laser Kit Built for Site Work

The Bosch GRL900-20HVK Revolve900 Rotary Laser Kit gives contractors a complete, field-ready solution for horizontal and vertical grade work right out of the box. Designed for moderate-scale grading, site layout, and elevation control, this kit pairs the reliable GRL900-20HV laser unit with all the accessories you need to get to work immediately — including the LR10 laser receiver, RC1 remote control, a heavy-duty tripod, and an inches grade rod. Whether you're establishing finish grade on a commercial pad or setting forms for a residential pour, the Revolve900 delivers the accuracy and dependability your crew expects.

Overview & Jobsite Applications

The GRL900-20HVK is an entry-level rotary laser system purpose-built for contractors who need consistent, accurate elevation control without the complexity of high-end survey instruments. Operating at 600 RPM with a self-leveling range of ±5°, it automatically compensates for minor out-of-level conditions so setup time stays short and productivity stays high. The working range extends up to 1,000 feet in diameter when used with the included LR10 receiver, making it well-suited for open grading sites, drainage work, and building layout applications. The RC1 remote lets one operator control the laser from anywhere on the jobsite, eliminating the need for a second crew member at the instrument.

Key Specifications

• Model: GRL900-20HVK
• Self-Leveling Range: ±5°
• Accuracy: ±1/16 in. at 100 ft.
• Working Range (with receiver): Up to 1,000 ft. diameter
• Rotation Speed: 600 RPM
• Laser Class: Class 3R (IIIa)
• Laser Wavelength: 635 nm (red)
• Battery Life: Up to 35 hours (4 x AA alkaline)
• IP Rating: IP54 dust and splash resistant
• Operating Temperature: -4°F to 122°F (-20°C to 50°C)

What's in the Kit

• GRL900-20HV Rotary Laser Unit — self-leveling horizontal and vertical operation
• LR10 Laser Receiver — detects the laser beam up to 500 ft. radius in bright daylight conditions
• RC1 Remote Control — single-operator control of laser functions from a distance
• BT 150 Heavy-Duty Tripod — stable aluminum tripod for consistent instrument height
• GR 500 Inches Grade Rod — 13 ft. telescoping rod for elevation readings
• Carrying Case — rugged hard case for secure transport and storage
• 4 x AA Batteries — included for immediate field use

Job Applications

Site Grading & Drainage: Set finish grade elevations across large areas quickly. The 1,000 ft. working diameter and remote control allow one operator to control grade checks across an entire pad without walking back to the instrument.

Foundation Layout & Forming: Establish level reference lines for concrete forms, footings, and slabs. Vertical mode supports plumb alignment of walls and columns.

Utility & Pipeline Work: Maintain consistent pipe slope and invert elevations over long runs using the receiver and grade rod for precise cut-and-fill decisions.

Landscaping & Hardscape: Level patios, retaining walls, irrigation systems, and drainage swales with reliable elevation control that doesn't require a survey crew.

Compatible Accessories

• Bosch LR10 Laser Receiver (replacement)
• Bosch RC1 Remote Control (replacement)
• Bosch BT 150 Aluminum Tripod
• Bosch GR 500 Telescoping Grade Rod
• Bosch BM 1 Wall/Ceiling Mount
• Bosch Laser Target Card Set

Related Guides

• How to Set Up a Rotary Laser for Site Grading
• Rotary Laser vs. Line Laser: Choosing the Right Tool for Your Job
• Using a Laser Receiver in Bright Daylight Conditions
• Bosch Rotary Laser Comparison Guide

Frequently Asked Questions

Does the GRL900-20HVK work in both horizontal and vertical modes?

Yes. The Revolve900 self-levels in both horizontal and vertical planes, making it suitable for grade work as well as wall layout and plumb alignment tasks.

What is the maximum working range of this laser kit?

When used with the included LR10 receiver, the GRL900-20HVK has a working range of up to 1,000 feet in diameter (500 ft. radius), which covers most commercial grading and layout applications.

Can one person operate this laser without a helper at the instrument?

Yes. The included RC1 remote control allows a single operator to adjust and control the laser from anywhere on the jobsite, eliminating the need for a second person stationed at the tripod.

Is this laser kit suitable for outdoor use in all weather conditions?

The GRL900-20HVK carries an IP54 rating, meaning it is protected against dust ingress and water splashing from any direction. It operates in temperatures from -4°F to 122°F, making it suitable for year-round outdoor use in most climates.