01 · WHO WE ARE
Company Overview
Changzhou Dadi Surveying Science & Technology Co., Ltd.
DADI is a measurement-technology manufacturer and R&D company based in Changzhou, China. Established in 1991, the company grew from optical and electronic distance measurement into surveying instruments and laser guidance for practical field and industrial applications.
Since 1991
Established
Changzhou, China
Location
Manufacturer & R&D
Business type
Technology for field and industry
Surveying Instruments
Total stations, electronic theodolites, GNSS / RTK systems and leveling instruments.
Trenchless Laser Guidance
Alignment equipment for pipe jacking, pilot tube guidance and underground construction.
DADI also develops industrial optical sensing and application-specific measurement solutions, supported by field accessories including prisms, tripods and poles.
OUR BEGINNING
A foundation in measurement.
DADI began as the Changzhou Dadi Distance Meter Factory in 1991. Its work in optical and electronic measurement forms the foundation of the instruments and systems developed today.
DADI company archive · 2006
02 · OPTICS, ELECTRONICS & LASERS
R&D & Technology
From optical measurement to application-specific systems.
DADI’s development work connects optical, electronic and laser measurement. Its technical background includes electronic distance measurement, angle measurement and laser guidance, with further work in industrial optical sensing and 3D perception.
Optical & Laser Systems
Measurement and alignment technologies for surveying and industrial use.
Angle Measurement
Development involving absolute encoders and optical encoder components.
Application Development
Configurations for specialized alignment and measurement tasks.
TECHNICAL DISCUSSION
Start with the measurement task.
Share the target, operating distance, accuracy needs and working environment. Our team can discuss suitable instrument configurations and the scope of any development work.
Discuss your technical requirements →03 · FROM ASSEMBLY TO VERIFICATION
Manufacturing & Quality
Inspection through the instrument’s production journey.
Precision instruments bring optical, mechanical and electronic components together. DADI’s manufacturing work connects component preparation, instrument assembly, adjustment and performance verification. Inspection requirements depend on the instrument and its configuration.
Practical checks for reliable use.
Assembly and adjustment focus on how the complete instrument performs. Product-specific checks may include measurement performance, alignment, controls and accessories before shipment preparation.
Ask our team for the applicable specification, test scope and documentation for the model you are considering.
01 · Preparation
Confirm the selected configuration, components and accessories.
02 · Assembly & Adjustment
Integrate the optical, mechanical and electronic parts for the instrument.
03 · Verification & Delivery
Review applicable performance checks and prepare the instrument for delivery.
Support beyond delivery
For calibration, maintenance or after-sales questions, include the model, serial number, operating conditions and a description of the issue so the team can advise on the next step.
Contact technical support →04 · BUILT AROUND YOUR REQUIREMENTS
Engineering & Customization
Adapt an existing instrument or develop a dedicated solution.
DADI provides product development, manufacturing and customization services for practical measurement applications. A technical discussion helps establish whether a standard configuration, an adaptation or a dedicated development project is appropriate.
OEM / ODM Services
Product variants, configuration, branding and project-specific adaptations based on existing products.
Custom Engineering
Application review, solution design, testing and preparation for production.
From requirements to a workable solution
01
Define the task
Application, target, range and accuracy.
02
Review feasibility
Working environment and technical constraints.
03
Develop & validate
Design, prototypes and agreed verification.
04
Prepare production
Confirm configuration and delivery requirements.
What to include in your project brief
Tell us what you need to measure, where the system will operate, the performance targets and any interface or integration requirements. Expected quantities and timing help define the scope.
Discuss a customization project →05 · WORK WITH DADI
Become a Distributor
Connect practical measurement products with local expertise.
We welcome discussions with distributors and partners who understand their local surveying, construction and industrial measurement markets. Introduce your business and the customers you support so we can explore a suitable product range and way of working together.
Market Knowledge
Understanding of local applications, users and purchasing needs.
Customer Support
The ability to explain products and coordinate technical questions.
Long-Term Cooperation
Clear communication on product selection, service and market development.
Tell us about your business
✓ Your company, location and territories served
✓ The industries and customer groups you work with
✓ Product interests and typical measurement applications
✓ Your local sales, technical and service capabilities