THINRAD TD PLUS Multi-Function Theodolite

The THINRAD TD PLUS is a multi-function theodolite that combines electronic angle measurement with short-range prism distance measurement and axis stakeout functions. With 2″ angular accuracy, a 30× telescope and absolute encoding, it provides the core capabilities of a digital theodolite while adding integrated EDM functionality for construction and engineering work.

The built-in distance measurement module can measure to a single prism at distances of up to 300 m, making the TD PLUS a practical option for projects where angle measurement, short-range distance measurement and alignment work are required in one instrument.

Key Features

• 2″ angular accuracy

• Absolute encoder angle measurement

• Integrated 300 m single-prism distance measurement

• Distance accuracy of ±(3+2 ppm)

• Axis stakeout function

• 30× erect-image telescope

• 40 mm effective aperture

• Single-axis compensator with ±3′ working range

• 2.8″ dot-matrix display

• Integrated laser plummet

• 8-hour continuous operating time

Multi-Function Measurement for Engineering Work

Unlike a conventional electronic theodolite, the TD PLUS adds integrated distance measurement and axis stakeout functions. This allows surveyors to perform angle observation, short-range distance measurement and alignment tasks without changing to a separate distance-measuring instrument for every operation.

The combination is particularly useful for construction layout, structural positioning, axis control and engineering measurement where compact field equipment is preferred.

Core Specifications

• Model: TD PLUS

• Angular accuracy: 2″

• Angle reading system: Absolute encoding

• Minimum angle display: 1″

• Telescope magnification: 30×

• Telescope image: Erect

• Effective aperture: 40 mm

• Resolving power: 3″

• Field of view: 1°30′

• Minimum focusing distance: 1.5 m

• Distance measurement range: Up to 300 m with single prism

• Distance measurement accuracy: ±(3+2 ppm)

• Distance measurement time: 0.35 s continuous / 1.5 s single measurement

• Atmospheric correction: Automatic correction after parameter input

• Prism constant correction: Supported

• Compensator: Single-axis

• Compensator working range: ±3′

• Compensator accuracy: ±3″

• Laser plummet accuracy: ±1.5 mm at 1.5 m

• Display: 2.8″, 160 × 96 dot matrix

• Power supply: 7.4 V lithium battery

• Continuous operating time: Up to 8 hours

• Operating temperature: -20°C to +50°C

• Dimensions: 165 × 160 × 340 mm

• Weight: 4.7 kg

Applications

• Construction layout

• Axis stakeout

• Structural positioning

• Engineering surveying

• Building alignment

• Short-range distance measurement

• Road and infrastructure construction

• General surveying