TD-1EA Optical Theodolite

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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 during the whole measurement process. The color field also makes the circle easy to read and ensures clear readings. Placed on a universal tripod, our optical theodolite has found applications in the hydrological investigation, geological exploration, road laying, water course, bridge, water control projects, urban construction, etc.

Features of the Optical Theodolite
1. Due to the optical micrometer, the vertical angle and horizontal angle can be directly read to a high accuracy of 1" or 1cc.
2. The telescope of the optical theodolite can form erect and reverse images.
3. With good resistance to high-frequency vibration, the X-long pendulum compensator of our optical theodolite can also automatically compensate the index error of vertical circle.

Specifications of the Optical Theodolite
Model TD-IEA
Measurement range   0º- 360º
Level standard deviation for one measurement per scan (outside)   0.8 "
Vertical standard deviation for one measurement per scan (indoor)   6"
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 20"/2mm
Circular level 8'/2mm
Graduated circle and optical micrometer Circle division Glass circles : 360º or 400g
Diameter of horizontal circle 90mm
Value of horizontal circle 20c
Diameter of vertical circle 70mm
Value of vertical circle 20c
Value of optical micrometer 1cc
Reading microscope Horizontal magnification 45.80×
Vertical magnification 58.80×
Auto compensator for index of vertical circle Working range ±2'
Installation error ±0.3"
Optical plummet Magnification
Field of view
Range of focusing 0.5m-∞
Instrument Net weight 6kg
Center height of horizontal axis 221mm
Size 310mm×160mm×148mm

More details
TD-1EA Optical Theodolite

We are a China-based optical theodolite manufacturer and supplier. We provide various types of products such as total station, RTK GNSS receiver F90, automatic level, and BTMS tunnel measurement system.

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