IN Brief:
- The ST30 combines a 360-degree prism, IMU, GNSS receiver and automatic rod-height measurement in a single surveying target.
- Tilt compensation applies to both optical and GNSS measurements, while tracking tools are designed to maintain or quickly recover total-station lock.
- The hardware is due to open for orders in Q4 2026, with high-accuracy GNSS offered as a separate subscription from 2027.
Trimble has launched the ST30 smart target, combining optical surveying and high-accuracy GNSS capability in a single field device intended for topographic surveys, stakeout, as-built verification and other construction and cadastral workflows.
The unit integrates a 360-degree prism, inertial measurement unit, GNSS receiver and automated rod-height functionality. It is designed to work with Trimble robotic total stations and the company’s field, office and cloud software, allowing the same target to support optical measurements and, with the relevant service, GNSS workflows.
One of the central changes is tilt compensation. Rather than requiring the survey pole to remain vertical for every observation, the ST30 can compensate for pole angle during both total-station and GNSS measurements. That allows points to be measured in constrained locations where holding a pole upright is difficult, while reducing reliance on manual offsets.
The device also monitors rod height automatically when used with supported field software. Rod-height errors are a mundane but potentially expensive source of bad survey data because an incorrect value can propagate into stakeout or as-built records even when the instrument itself is measuring accurately. Automating that input removes one manual step from the field workflow.
Tracking has received similar attention. Trimble has combined active tracking, target identification and its GeoLock GNSS-assisted technology so a total station can maintain the correct target or recover lock after line-of-sight is interrupted. On busy construction sites, where plant, structures and other crews can repeatedly obstruct an instrument, reacquiring the intended prism quickly can have a direct effect on daily output.
Boris Skopljak, senior vice president, geospatial at Trimble, said: “With optical and GNSS tilt compensation, automated rod height and integrated GNSS, users can reduce costly errors and work safely in more hard-to-access areas.”
The practical effect is to reduce the number of manual inputs and instrument changes required as crews move between conventional total-station work and GNSS positioning. The benefit will depend on site conditions and the accuracy requirements of each task, but the integration removes several routine points at which field errors can be introduced.
The hardware is built around a magnesium and aluminium structure with a protective top bumper and shielded LEDs. The prism is intended to support millimetre-level optical work, while the integrated design means crews do not have to swap to a separate receiver simply to move between optical and satellite-based positioning tasks.
The dual-use design is the more significant change for site layout. Optical total stations provide high precision where lines of sight can be maintained, while GNSS can extend positioning beyond those constraints when satellite visibility and correction services are adequate. Combining both approaches in one target gives crews a way to change method without treating the optical and satellite workflows as entirely separate systems.
The GNSS capability will not all be included as a permanent hardware entitlement. Trimble says high-accuracy GNSS will be available as a separate subscription from 2027. The company positions that option as a way to streamline site calibration and control setup while allowing users to operate beyond optical line-of-sight constraints when required.
The value of that flexibility will depend on how consistently measurements move through the wider project workflow. The ST30 integrates with Trimble Access, Siteworks and FieldLink in the field, Business Center in the office and Trimble Connect as a common data environment, and it can be paired with Trimble S-, RTS- and SPS-series robotic total stations.
Scott Crozier, senior vice president, civil construction at Trimble, said: “The ST30’s rugged design and automated features increase confidence on the job and reduce the potential for human error, which is particularly beneficial for an industry facing increased complexity, shorter deadlines and tighter tolerances.”
Survey errors are rarely confined to the measurement task itself. Incorrect control, stakeout or as-built information can drive rework in foundations, structural interfaces, services and prefabricated elements. Reducing manual entries and maintaining measurement quality in awkward positions therefore has implications for downstream construction accuracy as well as survey productivity.
The ST30 will be shown at INTERGEO 2026 in Munich from 15 to 17 September. Trimble plans to make the hardware available to order through its global dealer network in the fourth quarter of 2026, before the separate high-accuracy GNSS subscription becomes available in 2027.
The launch continues a wider shift in site measurement towards connected workflows in which instrument observations, layout data and project models are treated as parts of the same information chain. The ST30 does not remove the need to select the right positioning method for a particular task, but it narrows the physical gap between two of the main methods crews already use.
