TDJ6E Optical Theodolite

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Optical Theodolite

The TDJ6E optical theodolite can be used for various professional surveying in the construction and many other fields. It adopts an X-long pendulum compensator, which can automatically compensate the index error of vertical circle, and features good resistance to high-frequency vibration. Due to the optical micrometer, this precision optical instrument can directly read the vertical angle and horizontal angle to a high accuracy of 1" or 1cc. The telescope of the optical theodolite can present either erect images. The unique design of air damping structure makes stable and reliable performance of the instrument possible. The color field makes the circle easy to read with accuracy.

Manufactured according to the GB/T3161-2003 national standard, the optical theodolite can be used for third and fourth class national triangulation, precise traverse survey, setting out survey, and the installation of precision machinery. In most cases, it is usually placed on a tripod in the field, and can be commonly found in the hydrological investigation, geological exploration, road laying, water course, bridge, water control projects, urban construction, etc.

Specifications of the Optical Theodolite
Model TDJ6E
Measurement range   0º - 360 º
Level standard deviation for one measurement per scan (outside)   6"
Vertical standard deviation for one measurement per scan (indoor)   10"
Telescope Image Erect
Magnification 30×
Objective aperture 40mm
Field of view 1º30'
Shortest sighting distance 2m
Multiplication constant 100
Addition constant 0
Length of sleeve 172mm
Level Plate level 30"/2mm
Circular level 8'/2mm
Graduated circle and optical micrometer Diameter of horizontal circle 94mm
Value of horizontal circle
Diameter of vertical circle 76mm
Value of vertical circle
Scale unit of vernier 1'
Reading accuracy of vernier 0.1'
Reading microscope Horizontal magnification 68×
Vertical magnification 65.4×
Auto compensator for index of vertical circle Working range ±2'
Installation error ±1"
Optical plummet Magnification
Field of view
Range of focusing 0.5m-∞
Instrument Net weight 4.3kg
Center height of horizontal axis 207mm
Size 136mm×130mm×286mm

As a major optical theodolite manufacturer in China, our company provides a wide range of products that includes RTK GNSS receiver F90, total station, electronic theodolite, digital level, and much more.

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Other Products
  • TD-1EA Optical Theodolite The TD-1EA optical theodolite can be used for various professional surveying in the construction and many other fields. As the technical specifications of this precision optical instrument are in full compliance with the GB/T3161-2003 national standard, it can be used for third and fourth class national triangulation, precise traverse survey, setting out survey, and precision machinery installation.
    With the unique design of air damping structure, the instrument can work stably and reliably...
  • TDJ2E Optical Theodolite The X-long pendulum compensator of our optical theodolite can automatically compensate the index error of vertical circle, and has good resistance to high-frequency vibration.
    The color field makes the circle easy to read and ensures clear readings.
    Due to the optical micrometer, the vertical angle and horizontal angle can be directly read to a high accuracy of 1" or 1cc.