TS21
Visual Positioning and AR Stakeout
Measure what you see.
Reach the target with visual guidance.
Measure points from photos with the front camera and perform AR stakeout with dual cameras. TS21 combines GNSS, IMU and visual surveying in a compact housing.
Multiple constellations and frequencies
Broad signal tracking including GPS, GLONASS, BeiDou and Galileo.
Visual point measurement
Typical 2D accuracy at distances of 2–15 m.[1]
Front and bottom cameras
Visual stakeout support at different distances.
Field operation
7000 mAh battery and 15 W fast charging.[2]
Internal storage
On-device storage for survey data.
Field durability
Dust- and water-protected housing weighing approximately 850 g.
Without touching the point,
reaching the target.
Capture the site with the front camera and select the points to measure in the photos. Include hard-to-access targets in your visual survey workflow when line of sight and capture conditions permit.
One capture, multiple points
Continue measuring points by selecting different targets in images recorded in the field.
Link measurements to images
Locate the point selected in a photograph within the generated point cloud and visually follow the surveyed surface.
Turn field details
into measurements.
Generate and export point clouds from visual survey results. Select targets in images to record details across different surfaces.
Work with point clouds.
Point clouds generated from visual measurements let you use photographs and positioning data in the same project.
Select in the image.
Measure target points in photographs. The manufacturer's stated typical accuracy is 2–4 cm (2D) at distances of 2–15 m.[1]
Two cameras.
One target.
Front and bottom cameras display the stakeout target in live view at different distances. Move towards distant targets and follow the point on screen as you approach; perform CAD-based stakeout with visual guidance.
Clear images.
Data combined with position.
A global-shutter camera, low-distortion lens and image-processing system support visual positioning. GNSS and IMU data are evaluated together with camera imagery.
Bring field data
into three dimensions.
Process raw visual survey data recorded with TS21 in compatible 3D modelling software. Model facades and structural surfaces to add visual context to your survey.
Compact design.
Rugged housing.
Easy to carry at approximately 850 g and Ø134 × 71 mm. IP68 protection, a −40 °C to +70 °C operating range and up to 9 hours of battery life support fieldwork.[2]
Choose the camera setup
for your work.
TS20 and TS21 share the same compact housing. Choose according to whether you need photo-based point measurements alongside AR stakeout.
TS20
AR stakeout and target guidance in live view.
Explore TS20 →TS21
Photo-based point measurements, point-cloud generation and dual-camera AR stakeout.
This productTechnical specifications.
Explore TS21 GNSS performance, camera specifications, connectivity options and field durability.
GNSS and signal tracking
| Channel count | 1792 |
|---|---|
| GPS | L1 C/A, L1C, L2C, L2P, L5C |
| GLONASS | L1OF, L2OF, L3OC |
| BeiDou | B1I, B2I, B3I, B1C, B2a, B2b |
| Galileo | E1, E5a, E5b, E5AltBOC, E6 |
| QZSS | L1 C/A, L1C, L2C, L5C |
| SBAS / IRNSS | SBAS: L1 C/A, L5 · IRNSS: L5 |
| L-band / TAP | Satellite-based TAP service is available only on the TS21-TAP version. |
| Data update rate | 20 Hz |
Positioning performance
| RTK accuracy (RMS) | Horizontal: 8 mm + 1 ppm Vertical: 15 mm + 1 ppm |
|---|---|
| Network RTK accuracy (RMS) | Horizontal: 8 mm + 0.5 ppm Vertical: 15 mm + 0.5 ppm |
| High-precision static (RMS) | Horizontal: 2.5 mm + 0.1 ppm Vertical: 3.5 mm + 0.4 ppm |
| Static / fast static (RMS) | Horizontal: 2.5 mm + 0.5 ppm Vertical: 5 mm + 0.5 ppm |
| PPK accuracy (RMS) | Horizontal: 2.5 mm + 1 ppm Vertical: 5 mm + 1 ppm |
| DGPS accuracy (RMS) | Horizontal: 0.25 m Vertical: 0.5 m |
| Single-point accuracy (RMS) | Horizontal: 1.5 m Vertical: 2.5 m |
| RTK initialisation | Typically 4 seconds; initialisation reliability >99.9%.[1] |
| Time to first fix (TTFF) | Cold start: <30 seconds Warm start: <5 seconds |
| Signal reacquisition | <1 second |
| Time / velocity accuracy (RMS) | 20 ns / 0.03 m/s |
| Performance conditions | Values depend on satellite visibility, multipath, atmospheric and field conditions.[1] |
Cameras, AR and tilt compensation
| Camera configuration | Front camera + 2.0 MP bottom camera |
|---|---|
| AR stakeout | TwinCam visual guidance with front and bottom cameras |
| Visual positioning | Photo-based multi-point measurements with the front camera |
| Image-based point measurement accuracy | Typically 2–4 cm (2D), at a target distance of 2–15 m.[1] |
| Visual data | Point-cloud generation and export from survey results; 3D modelling in compatible software using raw visual survey data |
| IMU | Calibration-free tilt compensation resistant to magnetic interference |
| Tilt compensation accuracy | ≤2 cm within 60°.[1] |
| Electronic level | Supported |
Connectivity and internal radio
| Cellular connectivity | 4G LTE / WCDMA / GSM / EDGE |
|---|---|
| Network protocols | NTRIP Client, NTRIP Server, TCP, Tersus Caster Service (TCS) |
| Wi-Fi | 802.11 a/b/g/n/ac |
| Bluetooth | 5.0 |
| NFC | Supported |
| USB | Type-C, OTG |
| UHF frequency range | 410–470 MHz |
| Radio output power | 0.5 W / 1.0 W |
| Radio operating mode | Half-duplex |
| Channel spacing | 12.5 / 25 / 250 kHz |
| Modulation | CSS, GMSK, 4FSK |
| Radio data rate | 4800 / 9600 / 19200 bps |
| Radio protocols | LORA, TrimTalk450, TrimMark 3, South, Transparent, Satel |
Battery and power
| Internal battery | Lithium; 7000 mAh / 7.4 V |
|---|---|
| Operating time | Up to 9 hours.[2] |
| Fast charging | Maximum 15 W (5 V / 3 A) |
| Charging time | Approximately 3 hours (20% to 90%) |
| External power | 5–20 V via USB |
| Charging temperature | +10 °C to +45 °C |
| Battery indicator | Supported |
Housing and durability
| Dimensions | Ø134 × 71 mm |
|---|---|
| Weight | Approximately 850 g.[2] |
| GNSS antenna | Integrated |
| Protection rating | IP68 |
| Operating temperature | −40 °C to +70 °C |
| Storage temperature | −55 °C to +85 °C |
| Relative humidity | 100%, non-condensing |
| Drop resistance | 2 m pole drop onto concrete |
| Vibration resistance | MIL-STD-810G, FIG 514.6C-1 |
System, data and software
| Operating system | Linux |
|---|---|
| Internal storage | 32 GB |
| Differential data formats | CMR, CMR+ (GPS only), RTCM 2.x / 3.x |
| Data output | RINEX, NMEA-0183, Tersus Binary |
| Field software | Tersus NUWA |
| User interface | Power button; satellite, correction data, static survey and solution status LED indicators |
| Notifications | Voice feedback and power indicator |
TAP version and satellite corrections
| Applicable version | TS21-TAP only. TAP service should not be assumed for the standard TS21. |
|---|---|
| Correction source | Satellite-delivered TAP; PPP positioning without a local RTK base station or CORS connection |
| TAP accuracy (RMS) | Horizontal: 15 mm Vertical: 30 mm |
| TAP convergence time | Manufacturer's stated time: 3 minutes |
| Service selection | TAP version, activation and service conditions are determined during quotation. |
- Accuracy and initialisation times depend on satellite geometry, signal obstructions, multipath, atmospheric and observation conditions. The ≤2 cm tilt value applies to measurements within 60°. For visual point measurement, 2–4 cm is the typical 2D accuracy at target distances of 2–15 m. ppm is the baseline-dependent error component; 1 ppm equals 1 mm per kilometre.
- Battery life varies with operating mode, temperature and battery condition. Dimensions and weight may vary with manufacturing processes and measurement methods.
Technical source: TS21 technical datasheet (Ver. 2.1, 11 December 2025) and Tersus product information. TAP service is available only on the TS21-TAP version.
TS21 datasheet
View the technical specifications in PDF format.
Be ready for the field
with TS21.
Let us select the receiver, controller and software for your surveying work. Contact us for product information, a demo and a quotation.