Can I use the LT8-300P for both leveling and transit work without recalibration between measurements?

Yes—the LT8-300P is designed as a universal instrument with both functions integrated into one optical system. You can transition between level and transit measurements within the same setup by rotating the telescope; the optical plummet keeps the instrument centered over your point throughout both operations. No recalibration is required between function changes, though monthly verification of level calibration is recommended for ongoing accuracy.

How does the optical plummet improve setup time compared to using a separate plumb bob?

The optical plummet eliminates visual estimation and external tools—you center the instrument directly over your survey point by looking through the plummet lens from above, which is faster and more precise than dropping a plumb bob. On jobsites with multiple station observations, this integrated centering can save 30–60 seconds per setup, which adds up quickly across 20+ stations per day.

Will the optical plummet remain aligned after transport between jobsites?

The optical plummet is durable but can drift over time with rough transport or temperature extremes. Monitor alignment monthly and contact Express Tools for recalibration if you notice centering inconsistency. Proper protection in transit cases and avoiding temperature shock extends plummet alignment stability.

Is the LT8-300P accurate enough for building layout on large commercial projects?

Yes—the LT8-300P is professional-grade optical equipment suitable for general contractors laying out building lines and property boundaries on commercial sites. For survey-grade precision work (sub-inch accuracy over long distances), confirm with your surveyor, but for standard site layout and elevation work across typical construction projects, this instrument delivers the accuracy you need.

What tripod should I use with the LT8-300P, and are tripods included?

The LT8-300P is not sold with a tripod included; you'll need to pair it with a sturdy survey tripod rated for optical instruments. Any standard surveying tripod with a 5/8-inch or similar adapter will work—confirm compatibility with Express Tools if you're unsure about your existing tripod. Stability matters, so avoid lightweight contractor-grade tripods that shift under minor adjustment.

How do I maintain the optical plummet and lenses in the field to prevent degradation?

Clean optical elements regularly with a soft lens cloth—never use compressed air or rough materials that scratch coatings. Keep the instrument protected from extreme temperature swings by storing it in a padded case when not in use. In shaded conditions, the optical plummet visibility improves, so position yourself accordingly during setup. Avoid exposing the instrument directly to rain or high-pressure wash environments.

Spectra Precision LL300N-X11 PROMAX Laser Package, Deluxe Reciever, Remote Control, Tenths-Rod, HD Tripod, Rechargeble Batteries and Small Case

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At a Glance

Instrument Type: Universal level-transit
Primary Functions: Level and transit measurements
Optical Feature: Optical plummet for accurate centering
Model: LT8-300P
Manufacturer: David White
Key Feature 1: Combined level and transit functionality in one instrument

Spectra PrecisionLL300N-X11SKU 46-D8871New

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Spectra Precision LL300N-X11 PROMAX Laser Package, Deluxe Reciever, Remote Control, Tenths-Rod, HD Tripod, Rechargeble Batteries and Small Case

$1475.00

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±10% on both X and Y axes simultaneously Range

Cover large layout jobs with a ±10% on both X and Y axes simultaneously working reach.

±1.5 arc seconds (±0.9mm/10m) Accuracy

Hold grade with a ±1.5 arc seconds (±0.9mm/10m) accuracy rating.

Battery Life

Runs on Up to 100 hours per charge (rechargeable NiMH pack) for jobsite flexibility.

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Genuine, factory-fresh Spectra Precision equipment with legitimate firmware and calibration documentation.

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Eliminates the grade checker

Grade checkers cost $600-800/day. A rotary laser setup pays for itself in weeks and works indefinitely.

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Quick Answer

What is the Spectra Precision LL300N-X11?

The Spectra Precision LL300N-X11 PROMAX Laser Package, Deluxe Reciever, Remote Control, Tenths-Rod, HD Tripod, Rechargeble Batteries and Small Case is a Spectra Precision Rotary Laser with ±10% on both X and Y axes simultaneously grade range, ±1.5 arc seconds (±0.9mm/10m) accuracy, and ±5° automatic compensation self-leveling range. It's available from Express Tools as an authorized Spectra Precision dealer with same-day shipping on in-stock orders.

FIELD APPLICATIONS

What contractors use this rotary lasers for

Site Layout and Baseline Establishment

Use the transit function to establish building lines, property boundaries, and project baselines with angle measurements, then transition to the level function to verify elevations at grade stakes. The optical plummet centers the instrument precisely over your baseline monuments without repositioning, cutting setup time between measurement types.

Elevation Verification During Concrete Pours

Concrete crews use the level function to check finish elevations across large floor pours and verify that grade stakes remain accurate as work progresses. The optical plummet allows fast repositioning from stake to stake while maintaining instrument centering and measurement integrity.

Property Boundary and Survey Work

Professional surveyors rely on the dual functions to measure both horizontal angles for property line verification and vertical elevations for topographic documentation in a single setup. Eliminating equipment changes reduces fieldwork time and minimizes potential for operator error during instrument transitions.

Building Orientation and Angle Measurement

Use the transit function to measure building angles relative to baselines or property lines during site layout phases on commercial projects. Switch to the level function to verify that foundation grades match design elevations without removing the instrument from position.

Grade Stake Verification During Grading Operations

Grading contractors use the level function to confirm that machine operators are achieving specified cut and fill elevations while using the transit function to verify slope angles and drainage grades. The optical plummet enables rapid repositioning between stakes as grading work progresses across the site.

PRODUCT OVERVIEW

Product Description

The Spectra Precision LL300N-X11 PROMAX is a complete, field-ready laser kit assembled for finish-grade contractors who demand tenth-foot accuracy without sacrificing jobsite flexibility. By combining the LL300N dual-slope laser with a full-featured remote control, a deluxe grade receiver, a tenths rod, and rechargeable batteries, this kit eliminates the compromises that slow down high-precision drainage, utility, and site-finish operations.

Kit Overview & Jobsite Applications

The PROMAX configuration is purpose-built for contractors who regularly tackle complex grading assignments — finish pads, parking lot drainage planes, athletic fields, and multi-run utility trenches where grade tolerances are measured in tenths rather than hundredths of a foot. The remote-slope capability lets a single operator set, verify, and adjust grade from the rod position, eliminating the round-trips to the instrument that slow down small crews. Rechargeable batteries keep operational costs predictable on extended site campaigns, and the tenths rod pairs directly with the deluxe receiver for fast, readable cuts at finish-grade tolerances.

Key Specifications

Slope Range: ±10% on both X and Y axes simultaneously
Accuracy: ±1.5 arc seconds (±0.9mm/10m)
Self-Leveling Range: ±5° automatic compensation
Operating Range: Up to 2,000 ft diameter with included receiver
Rotation Speed: 100, 300, or 600 RPM selectable
Battery Life: Up to 100 hours per charge (rechargeable NiMH pack)
IP Rating: Sealed against dust and moisture for outdoor use
Remote Frequency: 418 MHz encrypted signal

What's in the PROMAX Kit

Spectra Precision LL300N Laser: Dual-axis remote slope transmitter with sealed housing
HL760 Deluxe Receiver: Large display, audible and visual grade indication, tenths-compatible readout
RC601 Remote Control: Full slope set, fine adjustment, power, and rotation speed from the rod
Tenths Rod: Graduated in 0.1 ft increments for finish-grade rod work
Rechargeable Battery Pack & Charging Dock: Field-proven NiMH system with AC/DC charging capability
Padded Carrying Case: Organized storage for all kit components
Mounting Hardware & Manual

Job Applications

Finish Pad Grading: Set dual cross-slopes remotely and read tenths cuts directly on the grade rod — no laser repositioning between layout and finish passes.

Parking Lot & Hardscape Drainage: Establish precise 1–2% cross-fall planes across large paved areas with real-time remote adjustment as conditions change.

Athletic Field Construction: Crown and sideline slopes on sports turf demand tenth-foot repeatability across wide areas — exactly what the LL300N and tenths rod deliver.

Utility Trench Slope Control: Set and hold pipe-fall grades on storm drain and sewer runs; remote slope adjustment lets one operator manage grade corrections without leaving the trench.

Compatible Accessories

Related Guides

Frequently Asked Questions

Can the LL300N-X11 PROMAX set two different slopes at the same time?: Yes. The LL300N supports simultaneous dual-axis slope — you can set independent X and Y grades up to ±10% on each axis concurrently, and both can be adjusted remotely via the RC601 without touching the instrument.
What is the advantage of the tenths rod over a standard grade rod?: A tenths rod is graduated in 0.1 ft increments, which aligns with the tolerances required for finish grading, paving, and athletic field work. It allows the rod person to read and call grade cuts without mental conversion, reducing errors on tight-tolerance applications.
How long do the rechargeable batteries last in the field?: The NiMH rechargeable pack included with the PROMAX kit is rated for up to 100 hours of runtime per charge under normal operating conditions. The included charging dock supports both AC and DC input, so you can recharge from a truck outlet between shifts.
Is the LL300N-X11 PROMAX covered by a warranty?: Spectra Precision backs the LL300N with a 3-year instrument warranty and a 1-year warranty on accessories. As an authorized Spectra Precision dealer, Express Tools supports the full manufacturer warranty process on all kits sold through our store.

Why This Equipment

Auto Self-Leveling

Compensates for job site movement and setups — no manual leveling required.

Long Range

Reach 2,600+ ft with a receiver — covers large pads and site-wide grading without moving.

IP55+ Protection

Dust-tight and water jet resistant — built for outdoor construction in any weather.

Radio Remote

Change grade or elevation from the cab or anywhere on site without walking back.

KIT CONTENTS

What's In The Box

David White LT8-300P Universal Level-Transit

Why Buy This?

The right rotary laser pays for itself in weeks.

A grade checker costs $600–800 per day. A quality rotary laser setup eliminates that cost indefinitely — and works faster. One operator with a good laser and receiver can cover ground that used to take a two-person crew.

The gap between a budget unit and a professional-grade one shows up in the field: self-leveling range on uneven pads, IP55+ protection through rain and dust, and radio remote control so you're not walking back to the instrument every time the job moves.

Express Tools is an authorized dealer with genuine, factory-fresh inventory and same-day shipping on in-stock units. We know this equipment and can answer spec questions before you order.

TECHNICAL SPECS

Specifications

Technical Specs

Manufacturer data and field-verified measurements.

Instrument Type	Universal level-transit
Primary Functions	Level and transit measurements
Optical Feature	Optical plummet for accurate centering
Model	LT8-300P
Manufacturer	David White
Key Feature 1	Combined level and transit functionality in one instrument
Key Feature 2	Optical plummet for precise centering over survey points
Key Feature 3	Eliminates need for multiple instruments
Key Feature 4	Professional-grade optical quality
Key Feature 5	Reliable performance across diverse jobsite conditions
Use Cases	Site layout and baseline establishment; Elevation verification; Property boundary surveys; Building orientation angle measurement; Grade stake verification during construction
Setup Steps	Mount instrument on stable tripod \| Level instrument using leveling screws \| Center over survey point using optical plummet \| Focus eyepiece for clear target visibility \| Rotate telescope for level or transit measurements as needed
Pro Tips	Use optical plummet in shaded conditions for best visibility \| Keep instrument protected from temperature extremes \| Clean optical elements with soft lens cloth regularly \| Verify level calibration monthly for accuracy
Compatible Equipment	Survey tripod; Leveling rod; Grade rod; Survey target
Common Issues	Optical plummet misalignment over time \| Leveling bubble drift in extreme temperatures \| Eyepiece focus difficulty in poor lighting \| Tripod stability on uneven ground
Grade Range	±10% on both X and Y axes simultaneously
Accuracy	±1.5 arc seconds (±0.9mm/10m)
Self-leveling Range	±5° automatic compensation
Rotation Speed	100, 300, or 600 RPM selectable
Battery Life	Up to 100 hours per charge (rechargeable NiMH pack)
IP Rating	Sealed against dust and moisture for outdoor use
Remote Control	Full slope set, fine adjustment, power, and rotation speed from the rod