Plott PRL900HT-R Bluetooth Dual Slope Rotary Laser with Detector — Red Beam

The Plott PRL900HT-R is a professional-grade dual slope rotary laser built for grading contractors, excavation crews, and site work teams who need reliable X and Y axis slope control without stepping up to a $2,500-plus instrument. With Bluetooth remote operation, a 2600-foot diameter working range, and an IP67 waterproof rating, the PRL900HT-R handles real-world jobsite conditions and delivers the dual-axis adjustability needed to eliminate constant laser repositioning on complex grading projects.

Dual Slope Rotary Laser Built for Serious Site Work

Dual slope capability means the PRL900HT-R can be set to grade in two directions simultaneously — critical for parking lot drainage, building pad prep, and any surface that requires a compound slope. The integrated Bluetooth module lets operators adjust slope settings, spin speed, and rotation from a smartphone or compatible remote, reducing trips back to the instrument on large sites. The red beam pairs with a compatible laser detector for bright-light exterior use and is well suited to machine control receivers on grading equipment.

Key Specifications

• Model: PRL900HT-R
• Beam Color: Red
• Working Range (Diameter): 2,600 ft (792 m) with detector
• Dual Slope Range: ±10% on both X and Y axes
• Accuracy: ±1/16 in at 100 ft
• Self-Leveling Range: ±5°
• Rotation Speed: 150 / 300 / 600 RPM selectable
• Connectivity: Bluetooth with app and remote control support
• IP Rating: IP67 waterproof and dust-tight
• Battery Life: Up to 50 hours (AA batteries)
• Tripod Mount: 5/8 in x 11 thread

Key Features

• Independent X and Y axis slope adjustment for compound grade applications
• Bluetooth remote control — adjust settings without leaving the grade rod or machine
• IP67 rated — fully dust-tight and submersible to 1 meter for 30 minutes
• Selectable rotation speed for balancing visibility and accuracy at distance
• Automatic self-leveling with out-of-level alarm to protect accuracy on shifting ground
• Compatible with standard 5/8 in tripods and elevator tripods for height flexibility
• Long battery life reduces downtime on full-day grading operations

Jobsite Applications

Parking Lot Grading: Set X and Y slopes simultaneously to achieve positive drainage to catch basins without repositioning the instrument. The 2600-foot range covers large commercial lots in a single setup.

Building Pad Preparation: Establish consistent elevation and slope across a building pad before forming or compaction. Dual axis control ensures the pad drains correctly in all directions as required by site plans.

Drainage Swales and Site Grading: Use the PRL900HT-R with a machine control receiver to guide motor grader or dozer blade height, maintaining designed slope grades across long drainage runs efficiently.

Foundation and Footing Layout: Switch to single-axis or flat rotation for foundation elevation control, using the detector and grade rod to confirm footing depth and uniformity across the entire pour area.

Compatible Accessories

• Plott Compatible Laser Detector / Receiver
• Tripod — Heavy Duty 8 ft Elevator Tripod
• Grade Rod — Telescoping Fiberglass Staff
• Machine Control Laser Receiver Bracket
• Replacement AA Battery Pack (8-cell)

Related Guides

• How to Set Dual Slope on a Rotary Laser for Parking Lot Grading
• Red Beam vs. Green Beam Rotary Lasers — Which Do You Need?
• Using a Rotary Laser with Machine Control Equipment
• Rotary Laser Buying Guide for Grading and Excavation Contractors

Frequently Asked Questions

Can the PRL900HT-R control slope on both axes at the same time?

Yes. The PRL900HT-R features true dual slope capability, allowing independent grade settings on both the X and Y axes simultaneously. This is essential for compound slope work like parking lot drainage and ADA-compliant surfaces where two-direction grade must be maintained at once.

Does the Bluetooth remote work with Android and iOS devices?

The PRL900HT-R's Bluetooth module is compatible with both Android and iOS devices via the Plott app. This allows you to adjust slope percentages, rotation speed, and leveling remotely from your phone without returning to the instrument.

What detector or receiver works with the PRL900HT-R red beam?

The PRL900HT-R requires a red-beam compatible laser detector. It is not compatible with green-beam-only receivers. Contact Express Tools to confirm detector compatibility if you are pairing this laser with an existing receiver or machine control system.

Is the PRL900HT-R suitable for use in rain or muddy conditions?

The PRL900HT-R carries an IP67 ingress protection rating, meaning it is fully dust-tight and can withstand submersion in up to 1 meter of water for 30 minutes. It is designed to handle rain, dust, and the general abuse of active construction sites.