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Topcon DE16 Diagonal Eyepiece 731109 for AT-B2
2-second Accuracy
Hold grade with a 2-second accuracy rating.
Authorized Topcon Dealer
Genuine, factory-fresh Topcon equipment 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 Topcon DE16?
The Topcon DE16 Diagonal Eyepiece 731109 for AT-B2 is a Topcon professional jobsite instrument with 2-second accuracy. It's available from Express Tools as an authorized Topcon dealer with same-day shipping on in-stock orders.
What contractors use this accessories for
Construction Layout
Precise positioning for structural and civil work
As-Built Documentation
Field-verified position records for project closeout
Grade Verification
Confirm elevations against design before pouring or paving
Product Description
The Spectra Precision DET-2 is a professional-grade digital theodolite engineered for general construction applications where accuracy and ease of use are paramount. This affordable, versatile digital transit combines proven theodolite technology with user-friendly features that make it ideal for contractors of all experience levels.
Key Features:
With 2-second accuracy, the DET-2 delivers precise angle measurements essential for layout work, site surveys, and construction staking. The digital display makes readings quick and eliminates the interpretation errors sometimes associated with optical theodolites, streamlining your measurement process and reducing mistakes.
Professional Applications:
Construction contractors use the DET-2 for building layout, foundation staking, lot surveys, and grade verification. Its versatile design adapts to residential, commercial, and civil construction projects where reliable angle measurement is critical to project success.
Why Contractors Choose This Model:
The DET-2 strikes the perfect balance between affordability and professional performance. You get digital precision without the premium price tag, making it an excellent choice for contractors who need reliable measurements without breaking the budget. The straightforward operation means minimal training required, getting your crew productive immediately.
Express Tools Professional Grade:
When you need a theodolite that performs like a professional instrument but doesn't require a specialist to operate, the Spectra Precision DET-2 delivers exceptional value. Perfect for contractors building their surveying toolkit or upgrading existing equipment.
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.
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.
| SKU | Spectra Precision DET-2 |
|---|---|
| Type | Digital theodolite/transit |
| Accuracy | 2-second |
| Display | Digital |
| Key Feature 1 | 2-second angle measurement accuracy |
| Key Feature 2 | Digital display reading |
| Key Feature 3 | User-friendly interface |
| Key Feature 4 | Error elimination through digital readout |
| Key Feature 5 | Affordable professional-grade construction |
| Use Cases | Building layout; Foundation staking; Lot surveys; Grading work; Construction site surveys; General construction applications |
| Setup Steps | Mount DET-2 on tripod at measurement location | Level the instrument using bubble levels | Sight target and adjust focusing | Read digital angle display | Record measurements |
| Pro Tips | Use high-quality tripod for optimal stability | Replace batteries before extended field sessions | Take shade breaks to verify display readings in sunlight | Perform calibration checks before critical layout work |
| Compatible Equipment | Professional surveying tripods; Prism assemblies; Reflective targets; Survey measuring tapes |
| Common Issues | Tripod instability affecting measurements | Battery depletion during field work | Display visibility in bright sunlight |
Built for Topcon 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
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Topcon DE16 Diagonal Eyepiece 731109 for AT-B2
$350.00

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
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