Alpha T Series

Alpha T Series Total Station for Surveying and Construction

The Alpha T Series combines precise angle measurement, long-range distance measurement and practical surveying functions in a manual total station. Designed for land surveying, construction layout and engineering projects, the series helps professionals measure points, establish control, set out positions and collect reliable field data.

The range consists of two models: the Alpha Ti with 1.5″ angular accuracy and the Alpha Tx with 1″ angular accuracy. Both feature a 30x telescope, reflectorless measurement up to 1,000 metres and an absolute angle encoding system. This makes the Alpha T Series suitable for everyday site measurements as well as projects requiring tighter angular tolerances.

Precise Angle and Distance Measurement

Accurate angle measurement is essential when establishing survey control, checking construction geometry or setting out points over longer distances. The Alpha Ti provides 1.5″ angular accuracy, while the Alpha Tx offers 1″ accuracy for applications where small angular differences can become significant over distance.

Both instruments use absolute encoders for angle measurement. This technology provides a stable measurement reference and allows the instrument to retain angle information through a restart without requiring a new encoder initialization.

The built-in electronic distance measurement system provides reflectorless measurement up to 1,000 m. Surveyors can measure suitable surfaces without placing a prism directly on the target, which is useful when working on building facades, structures, excavations or points that are difficult to access. For longer measurements with a single prism, the Alpha Ti supports up to 4,000 m and the Alpha Tx up to 5,000 m under specified conditions.

Reflectorless performance depends on target reflectivity, surface angle, visibility and environmental conditions. Using a prism remains important when the highest repeatability and distance accuracy are required.

Clear Optics for Accurate Targeting

The Alpha T Series uses an optical system with 30x magnification to help operators identify and aim at survey targets. Clear target visibility is particularly useful when measuring small prisms, distant control points or detailed construction features.

Optical correction technology helps reduce colour distortion and improve clarity through the telescope. Together with the electronic distance measurement system, this supports consistent aiming and measurement during detailed field surveys.

Dual-Axis Compensation and Laser Centering

Both models feature a dual-axis compensator with a ±4′ operating range. The compensator detects small instrument tilts within its working range and helps reduce the effect of residual leveling errors on measurements. This is useful on construction sites where the instrument may be set up repeatedly on different surfaces.

A built-in coaxial laser plummet assists with positioning the total station over a known survey point. This makes instrument setup more convenient when establishing stations and performing repeat measurements.

The combination of accurate leveling, electronic compensation and stable angle measurement supports reliable results during traversing, control work and construction stakeout.

Built-In Surveying and Stakeout Functions

The Alpha T Series includes onboard measuring functions for common surveying tasks. Operators can work directly from the instrument without needing a separate controller for every basic measurement operation.

Available functions include coordinate measurement, station resection, point stakeout, reference line stakeout, remote height measurement, missing line measurement, offsets and area calculations.

For construction teams, these functions can be used to transfer design coordinates onto the ground, position building elements, check distances between installed features or verify the geometry of completed work. Surveyors can also use the instrument to measure existing site features and collect coordinates for further processing.

Colour Display and Practical Field Controls

A 3.2-inch colour display provides access to measurement information, instrument settings and surveying applications. The control panel includes 26 keys with backlighting, supporting operation in low-light conditions such as tunnels, indoor construction environments and early-morning surveys.

Customizable function controls allow operators to access frequently used commands more conveniently. A dedicated measurement trigger also helps reduce unnecessary instrument movement when taking observations.

For field data handling, the instrument provides USB and Bluetooth connectivity, with internal memory for up to 40,000 points. This allows survey teams to store observations and transfer survey data for documentation or further office processing.

Alpha Ti vs Alpha Tx: Choosing the Right Model

Alpha Ti: Accurate Everyday Surveying

The Alpha Ti is designed for general surveying, construction positioning and engineering measurements that require dependable angular and distance accuracy. Its 1.5″ angular accuracy, 4,000 m single-prism range and IP54 protection rating make it a practical option for field teams carrying out site surveys, coordinate measurements and regular construction layout.

It offers the essential measurement functions needed for everyday survey work, including reflectorless observations and onboard stakeout applications.

Alpha Tx: Higher Precision for Engineering Projects

The Alpha Tx provides 1″ angular accuracy and a refined alloy shaft assembly designed to support stable, precise instrument rotation. Its high-resolution angle detection and compensation system make it particularly suitable for survey control, industrial measurement, tunnel alignment and deformation monitoring tasks.

The Tx also provides an extended single-prism measuring range of up to 5,000 m and an IP65 protection rating for greater resistance to dust and water exposure. For projects that require tighter measurement tolerances or frequent use in demanding outdoor conditions, the Alpha Tx is the more advanced option in the series.

Designed for Demanding Fieldwork

Surveying instruments must perform reliably through long working days and changing site conditions. The Alpha T Series uses rechargeable lithium-ion batteries and supports up to 20 hours of combined angle and distance measurement under specified conditions. This helps survey teams work through extended sessions with fewer interruptions for battery changes.

The instruments operate in temperatures from -20°C to +50°C. The Alpha Ti has IP54 dust and water protection, while the Alpha Tx is rated IP65. Both are suitable for professional field use, although operators should always follow proper instrument handling and maintenance procedures.

Applications in Surveying, Construction and Engineering

The Alpha T Series can be used across a range of projects where accurate angles, distances and coordinates are required.

• Land surveying: Measuring boundaries, topographic features, survey control points and existing site conditions.
• Construction layout: Setting out foundations, structural positions, reference lines and design coordinates.
• Civil engineering: Supporting roadworks, infrastructure projects, alignment checks and site verification.
• Tunnel engineering: Measuring control points and checking alignment in enclosed or GNSS-restricted environments.
• Industrial surveying: Checking positions and geometry where precise angle and distance measurements are necessary.
• Deformation monitoring: Supporting repeated observations of selected reference points to assess movement over time.

Because a total station measures using optical sighting rather than satellite positioning, it is particularly valuable for work inside buildings, in tunnels or near structures where GNSS signals may be obstructed. The instrument requires a clear line of sight to the measured target.

Alpha T Series at Global GPS Systems

Choosing the right total station depends on the required accuracy, typical measurement distances and the environment in which the instrument will be used. The Alpha Ti is a capable solution for standard surveying and construction work, while the Alpha Tx provides additional angular precision and protection for more demanding engineering applications.

Global GPS Systems supplies the Alpha T Series to surveying and construction professionals worldwide. Our team can help you compare the two models, select suitable prisms and accessories, and identify a configuration that fits your fieldwork requirements. With international delivery and product support, Global GPS Systems helps professionals get the equipment they need for accurate and efficient surveying.