Free Shipping on orders over $500

Northwest Instruments NETH503 5" Digital Theodolite with Dual LCD, Optical Plummet and 80-Hour Battery - NWi
Power Source
Runs on Rechargeable battery system with standard alkaline battery compatibility for jobsite flexibility.
Authorized Dealer
Genuine, factory-fresh equipment from leading manufacturers, with legitimate firmware and calibration documentation.
Same-Day Shipping
In-stock orders placed before 2 PM CT ship the same day.
Buy With Confidence
Compatibility and setup details on every product, plus our AI assistant for quick questions.
Authorized Dealer
Genuine equipment sourced straight from manufacturer partners.
Ships Same Day
Orders placed before 2 PM CT leave the dock today.
Genuine Gear
Factory-fresh, authentic units with legitimate firmware.
Best-Price Guarantee
Authorized-dealer pricing on every unit — request a quote anytime.
Kit Builder
Not sure what goes with this accessory?
Answer a few job questions and our Kit Builder assembles the full setup — receiver, rod, tripod, and case matched to your workflow.
Quick Answer
What is the Northwest Instruments NETH503 5" Digital Theodolite with Dual LCD, Optical Plummet and 80-Hour Battery - NWi?
The Northwest Instruments NETH503 is a 5" digital theodolite featuring dual LCD displays, an optical plummet for precise positioning, and an 80-hour battery life for extended field use. This surveying instrument combines digital readout capabilities with traditional optical alignment technology for accurate angle measurements in construction and surveying applications.
What contractors use this accessories for
Concrete Pad Grading
Set the laser on tripod at your pad reference point, use the CR700 receiver to confirm rod readings across the pour area, and get consistent height and slope for proper drainage and finish. This workflow cuts layout time and gives your concrete crew confidence in elevation before pouring.
Foundation Excavation and Site Prep
Use the horizontal beam to establish grade lines for footing depth and subgrade elevation across multiple stakes and offsets. The vertical capability lets you check wall plumb and pier height, making this laser do double duty on excavation and formwork setup.
Landscape Drainage and Grading
Grade slopes for swales, berms, and drainage paths by shooting multiple rod positions and comparing readings to your target slope line. The INCHES rod and single slope laser keep the math simple and the grade accurate on residential and light commercial landscape work.
Driveway and Parking Lot Slopes
Establish and verify proper crown and cross-slopes for asphalt or concrete drive work by shooting elevation at key points across the width. The red beam visibility and quick CR700 detection speed up layout on long, narrow projects.
Grade Stake Setup and Verification
Set cut and fill stakes on a grading project by establishing your reference datum with the laser, then take rod readings to determine required elevation at each stake. Use the vertical beam for plumb checks on tall stakes or column references.
Product Description
The Spectra Precision GL412N-26 Single Grade Laser is a robust single slope grading laser featuring the CR700 receiver and an INCHES-scale rod and tripod package. Designed for contractors who need precision grading in inch measurements, this horizontal and vertical red beam laser provides the accuracy and reliability required for professional construction work.
Complete Package Contents:
You receive the GL412N-26 laser unit with rechargeable battery system, the CR700 receiver for dependable signal detection, and a full INCHES-rod and tripod package ready for immediate deployment on your job site. The red beam technology ensures excellent visibility and target acquisition in all lighting conditions.
Professional Applications:
This laser system excels in site preparation, concrete pad grading, foundation work, and landscape grading projects where inch-level precision is critical. The single slope configuration provides accurate horizontal and vertical measurements, making it ideal for both flat work and sloped grading applications common in residential and light commercial construction.
Built for Contractor Success:
As a Spectra Precision product, the GL412N-26 combines field-proven technology with user-friendly operation. The included CR700 receiver ensures fast, accurate measurements, while the INCHES-scale rod helps contractors work confidently with standard measurement units. Rechargeable batteries reduce fuel costs and environmental waste compared to battery-dependent alternatives.
Invest in laser grading technology that professionals depend on—choose the GL412N-26 for reliable, precise construction grading.
Why This Equipment
Authorized Dealer
Genuine, factory-fresh inventory with legitimate firmware and calibration documentation.
Same-Day Shipping
In-stock orders placed before 2PM ship same day from our Texas warehouse.
Expert Support
Call or chat with a contractor equipment specialist before and after your purchase.
Free Shipping
Free ground shipping on orders $99+ to the continental US.
What's In The Box
- GL412N-26 laser unit
- CR700 single-display receiver
- INCHES-graduated rod
- Tripod with 5/8-11 universal thread
- Rechargeable batteries
Professional-grade equipment, authorized dealer pricing.
The tools contractors trust on municipal infrastructure, commercial projects, and high-tolerance earthwork aren't available at hardware stores — and they shouldn't be. This equipment is engineered for professionals, and buying it through an authorized dealer means you get full manufacturer support when it matters.
Express Tools carries only factory-fresh inventory from brands contractors specify by name. No gray-market product, no import-spec units, just authentic gear with legitimate firmware and calibration documentation.
Same-day shipping on in-stock items, expert support before and after the sale, and a 30-day return window on most products. If you have questions about specs, compatibility, or applications, call us — we know this equipment.
Specifications
Technical Specs
Manufacturer data and field-verified measurements.
| Brand | Spectra Precision |
|---|---|
| Model | GL412N-26 |
| Type | Single Grade Laser |
| Beam Type | Red beam horizontal and vertical |
| Receiver | CR700 single-display receiver |
| Rod Graduation | INCHES (imperial measurement) |
| Tripod Thread | 5/8-11 universal |
| Power Source | Rechargeable battery system with standard alkaline battery compatibility |
| Package Includes | GL412N-26 laser unit, CR700 receiver, INCHES-rod, tripod, rechargeable batteries |
Built for equipment owners
Run the jobsite around your equipment
Gradelog is the AI field platform for contractors — grade shots, photo documentation, calibration tracking, and as-built reports, all tied to your gear.
- Equipment & calibration tracking
- Photo + grade documentation
- AI field assistant, 8 languages
Customers Also Bought
Field Calculators
Guides & Resources
Common Issues & Error Codes
Frequently Asked Questions
Customer Reviews
No reviews yet — be the first.
Loading reviews…
Northwest Instruments NETH503 5" Digital Theodolite with Dual LCD, Optical Plummet and 80-Hour Battery - NWi
$1295.00

Free 30 days with every Express Tools purchase
Your equipment. Your data. All in one place.
Gradelog is the field-execution platform built for grading and earthwork crews. Log grade shots, track cut/fill, document phases with photos, and generate as-built reports — from the cab to the office.
- Grade shots & cut/fill tracking per job
- Photo documentation by phase, task, and equipment
- As-built reports ready for inspector sign-off
- AI field assistant — troubleshoot on the jobsite

Built by the same team as Express Tools
Try Free →30 days
Free trial
8 languages
Supported
iPhone + Android
Works on





