Features: can store 500 sets of measurement data to meet project needs large-screen, full Chinese display, can display vertical and horizontal angle can be freely converted, date, time show, laser light to the point, make you more convenient high The electronic compensation, automatic compensation range up to ± 3 ', double-sided LCD dot matrix LCD display, easy operation, excellent cost performance, data can be passed directly to commonly used computer theodolite, high-performance ultra-low dispersion ED lens theodolite Hardware imaging clear, bright, waterproof, dustproof. DT-02L Telescope Image Erect Magnification 30x Effective aperture 45mm Resolution 3 'FOV 1 ° 30' Minimum sight distance 1.4m Stadia multiplication constant 100 Stadia constant 0 Tube length 157mm Angle section goniometer way absolute encoder encoder disk diameter 79mm Minimum reading 1 'Accuracy 2' diameter detection method for the vertical angle of the horizontal path Vial Vial 30 "/ 2mm circular level 8 '/ 2mm automatic vertical compensator System Liquid electronic sensors: 4' Working range ± 3 'precision liquid electronic sensors: 1 "laser plummet (DT-02L / 02CL / 02NL / 02LN applicable) Wavelength 635nm Power 0.5mW focus point mode Focus 120m effective range of physical characteristics Ambient temperature -20 ℃ ~ + 45 ℃ onboard battery rechargeable Ni - MH battery / AA Battery continuous operation 10 hours a vertical angle measuring principle vertical angle is within the same vertical plane, the horizontal angle α theodolite sight between a target direction, also known as the vertical angle or height angle; angle vertical angle is 0 ° ~ ± 90 °. Angle with the vertical line of sight is called the zenith distance, zenith angle from the z values ??ranging from 0 ° ~ 180 °. When the line of sight when the vertical angle above the horizon called the elevation angle is positive; sight below the horizon at the time of the depression theodolite corrected angle is negative, as shown in FIG. From this angle measurement instrument theodolite must also be equipped with a vertical placement can dial - vertical circle, also known as Vertical theodolite readings _ Branch of the Instrument (certified) _ theodolite Qingdao Branch of the Instrument Co., Ltd. provided. 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.