The DSD-IIIA is a classic, field-proven guidance system for pilot tube microtunneling. Trusted by Southeast Asian construction teams for over 5 years, it features a robust manual focus design that gives operators precise physical control over alignment, ensuring millimeter-level accuracy in underground pipe jacking.

The XT-03 represents the third generation of our proprietary solid-state technology. Building on the success of previous prototypes, the XT-03 offers optimized algorithms and superior stability for mass production.

A professional-grade Electronic Total Station 

Designed for high-precision engineering surveying and construction layout. 

2-Second Accuracy: High precision with robust EDM capabilities.

All-Weather: Reliable measurements in harsh field conditions.

Versatile: Ideal for civil engineering, mapping, and cadastral surveys.

Manufactured by Changzhou Dadi Surveying Science & Technology Co., Ltd. (Est. 1991) 

— Combining optical stability with cost-effective performance.

High-Precision: 2" Angle Accuracy with Absolute Encoder

Optics: 30x Magnification Telescope with clear imaging

Rugged Design: Compact, lightweight, and built for engineering sites

Display: Dual-side large LCD display for easy reading

Operation: User-friendly keypad with numeric shortcuts

Plummet: Laser Plummet (Standard) for fast setup

Power: Rechargeable Ni-MH battery (Approx. 10 hours operation) 

DSZ32 with 32x Magnification

Compensator range: ≥±15′

Minimum focus range up to 0.4 meters (15.75 inches)

Leveling accuracy (Standard Deviation for 1km Double-run levelling): 1.0mm

X-shaped wire suspension air-damping

Horizontal circle: 1 degree (1 gon)

Compensator accuracy: ±0.3″

IP54 high-pressure water jet resistant

Tripod Thread: M16 or 5/8″

With handrails

DSZ32B with 32x Magnification

Compensator range: ≥±15′

Minimum focus range up to 0.5 meters (1.64 inches)

Leveling accuracy (Standard Deviation for 1km Double-run levelling): 1.0mm

X-shaped wire suspension air-damping

Horizontal circle: 1 degree (1 gon)

Compensator accuracy: ±0.3″

IP54 high-pressure water jet resistant

Tripod Thread: M16 or 5/8″

2" Angular Accuracy & 2mm+2ppm Distance Accuracy

600m Reflectorless Range & 3000m Prism Range

USB Plug-and-Play & Bluetooth Connectivity

Rugged Design with Visible Laser Pointer

Fast Measuring Speed: 0.8s in Tracking Mode

Angular accuracy of 2-secs, 5 -secs or 10 -secs

Magnification up to 30x

Ten-button interface panel that is easy-to-use

Up to 8 hours battery life (uninterrupted work flow)

Dual Backlit LCD display

Compact and lightweight build

Build-in Laser Pointer

DSZ38 with 38x Magnification

Compensator range:  ≥±15′

Minimum focus range up to 0.7 meters (27.55 inches)

Leveling accuracy (Standard Deviation for 1km Double-run levelling): 0.7mm

X-shaped wire suspension air-damping

Horizontal circle: 1 degree (1 gon)

Compensator accuracy: ±0.3″

IP66 high-pressure water jet resistant

Tripod Thread: M16 or 5/8″

With handrails (Option)

2" angular accuracy

- accurate enough for any construction job

Touch screen, windows system

Fast measuring speed

Prism Range 3,000 m Accuracy 2mm + 2 ppm

Reflectlorless Range 600 m Accuracy 3 mm + 2 ppm

Angular accuracy of 2-secs, 5 -secs or 10 -secs

Magnification up to 30x

Ten-button interface panel that is easy-to-use

Up to 8 hours battery life (uninterrupted work flow)

Dual Backlit LCD display

Compact and lightweight build

Build-in Laser Pointer