Optical theodolite theodolite low sales, measuring horizontal and vertical angles of the instrument; angle measurement principle is based on the design. The most commonly used is an optical theodolite. Depending on the scale theodolite and readout mode dial is divided into vernier theodolite electronic theodolite models, optical theodolite and electronic theodolite. At present, China mainly uses optical theodolite and electronic theodolite, theodolite cursor already eliminated. Electronic theodolite theodolite theodolite electronic theodolite theodolite structure (mainly common parts): 1. 2. telescope telescope clamp screw 4. 3. telescope micro level micro-level brake 5. 6. spiral helix 9 feet. 10. The optical sight eyepiece focusing lens focusing 11. 12. 13. The dial reading microscope focusing vertical index vial drive screw 14. The optical plummet 15. 16. base Circular level instrument base 17. Vertical dial dial illumination vertical mirror 18. 19. 20. vial alidade horizontal circle position conversion handwheel electronic theodolite to measure horizontal and vertical angles of the instrument. By the British mechanic Sisson (Sisson) first developed about in 1730, and later improved molding, the official for the British geodesy. In 1904, Germany began production of glass dial theodolite. With the development of electronic technology, electronic theodolite 60's. On this basis, the 1970s made electronic speed measuring instrument. Electronic theodolite Model | Jinke Instruments (certified) | theodolite by Qingdao Branch of the Instrument Co., Ltd. Qingdao Branch of the Instrument Co., Ltd. (www.qdjk17.com) is in Qingdao, Shandong analysis instruments leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Branch of the Instrument in leadership with the staff warmly welcome all inquiries negotiations to create the Branch of the Instrument better future.