Changzhou Dadi Surveying

30+ Years of Excellence in Surveying Instruments

(Premier Manufacturer of Geodetic Equipment Since 1991)

Who We Are

The company was originally founded in 1991 as the Changzhou Dadi Distance Meter Factory (常州大地测距仪厂). 

Our first manufacturing base was established at No. 3 Changcheng Road, located inside the Changzhou Institute of Technology.

This academic foundation laid the groundwork for our expertise in precision measurement. 

Today, Changzhou Dadi Surveying Science & Technology Co., Ltd. has evolved from that specialized workshop into a comprehensive 

enterprise integrating R&D, manufacturing, and global sales in the Changzhou National High-tech District.

INTELLECTUAL PROPERTY 

Our Intellectual Property (IP) Portfolio

Innovation is in our DNA. We currently hold:

25 National Patents

28 Software Copyrights

4 Registered Trademarks

Innovation Focus: From "Zero to One"

We pride ourselves on Independent Original Design. Distinct from manufacturers who rely on reverse engineering or imitation, 

Dadi refuses to take shortcuts. We insist on building our core technology from scratch.

The 3-Year R&D Cycle: We believe stability comes from time and rigor. Every Dadi product undergoes a development cycle of 

at least 3 years—taking a concept from "Zero to One." We patiently evolve each product from its initial prototype to a perfectly 

stable industrial tool, ensuring it is ready for the real world.

Success Case - Trenchless Guidance Systems: Leveraging our core technology in Electronic Theodolites and Total Stations, 

we successfully developed a specialized Laser Guidance System for Pipe Jacking. This system has become the most renowned 

solution in the Southeast Asian market, widely adopted by professional Pipe Jacking Equipment manufacturers to significantly 

enhance their equipment's precision and sales performance.

Equipment production

Equipment inspection

Equipment testing

Product Portfolio

We specialize in a full spectrum of geospatial solutions:

Theodolites: Both Digital and Optical models, renowned globally for operational stability.

Total Stations: Featuring our proprietary laser ranging technology.

GNSS / RTK Systems: Reliable centimeter-level positioning for complex environments.

Trenchless Guidance Systems: The leading laser guidance solution for pipe jacking in Southeast Asia.

Automatic Levels: Robust designs for daily construction tasks.

Laser Instruments & Accessories: Precision tools for interior and exterior alignment.

Our Quality Commitment (The "Dadi Standard")

At Dadi, we believe that precision is the lifeline of surveying.

Rigorous Internal Control: We implement a strict "Zero-Defect" system. 

Every instrument undergoes 100% inspection and calibration on our high-precision collimators before packaging.

Environmental Testing: Tested to withstand harsh field conditions (dust, moisture, temperature extremes).

Transparent Verification: We fully support and encourage Third-Party Inspections (such as SGS, Intertek) prior to 

shipment to ensure your peace of mind.

Why Partner with Changzhou Dadi?

Stability & Experience: Legally established in 1991. A partner with deep roots.

Original R&D Capability: We design our own solutions, ensuring unique competitive advantages for our clients.

Direct Factory Pricing: Eliminating middlemen for the best price-to-performance ratio.

Responsive Support: Lifetime technical consultation and guaranteed spare parts availability.

Mission Statement

To empower professionals worldwide with stable, high-precision instruments built on decades of original research 

and engineering.

Contact Us Today for a Quote

Equipment production

Equipment inspection

Equipment testing