Key Features

• High-precision 5-second angular accuracy for professional surveying
• Advanced photoelectric incremental encoder system for reliable measurements
• Measures both horizontal and vertical angles with digital display
• Dual-sided backlit LCD displays for easy angle reading
• Powerful 30x telescope magnification for precise target acquisition
• Optical plummet for fast and accurate setup over control points
• Integrated tilt sensor for improved vertical angle monitoring
• Reticle illumination for low-light and indoor operation
• Rugged compact design for construction and field environments
• Up to 40 hours of continuous battery operation
• RS232C serial port for convenient data transfer
• Ideal for construction layout, engineering alignment, cadastral, and topographic surveying

Product Description

The Northwest Instrument NETH503 5-Second Digital Theodolite (Item 10503) is a professional electronic surveying instrument designed for accurate horizontal and vertical angle measurements in construction, engineering, and land surveying applications. Featuring advanced photoelectric incremental encoding technology, the NETH503 delivers dependable 5-second angular accuracy with stable digital readouts for demanding fieldwork.

Built with dual-sided LCD displays and a powerful 30x telescope, the NETH503 provides clear viewing and efficient operation in various job site conditions. The integrated optical plummet allows quick centering over survey points, while the built-in tilt sensor improves measurement reliability by monitoring vertical angle deviations. Reticle illumination also supports operation in tunnels, indoor environments, and low-light conditions.

Its compact and rugged construction makes the instrument suitable for daily construction layout, topographic surveys, railways, bridges, highways, mining, and infrastructure projects. With long battery life, RS232C data transfer capability, and dependable optical performance, the Northwest Instrument NETH503 offers excellent value for professional surveyors and contractors

Specifications

• Model: NETH503
• Item Number: 10503
• Brand: Northwest Instrument
• Type: Digital Electronic Theodolite
• Angular Accuracy: 5 Seconds
• Minimum Reading: 5″
• Telescope Magnification: 30x
• Objective Lens Diameter: 45mm
• Resolving Power: 4″
• Field of View: 1°20′
• Minimum Focus Distance: Approx. 0.9m (3 ft)
• Image: Erect
• Measurement System: Photoelectric Incremental Encoder
• Display: Dual-Sided LCD Display
• Optical Plummet: 3x Magnification
• Tilt Sensor: Integrated
• Reticle Illumination: Included
• Stadia Ratio: 1:100
• Communication Port: RS232C
• Power Supply: 4 × AA Alkaline or Rechargeable Batteries
• Operating Time: Up to 40 Hours
• Weight: Approx. 4.5–7kg (depending on configuration)
• Applications: Construction Layout, Engineering Alignment, Cadastral Surveying, Topographic Surveying, Railways, Bridges, Mining

What’s Included

• Northwest Instrument NETH503 Digital Theodolite
• Hard Carrying Case
• Optical Plummet
• Alkaline Battery Pack
• Tool Kit
• Plumb Bob
• User Manual