UNI-GR2 RTK GNSS receiver
Anyone can survey with centimetre accuracy
The UNI-GR2 is our most universal RTK GNSS receiver. Six constellations, many frequencies and open interfaces give you a centimetre-accurate fix in almost any environment, and let you connect it to the tools you already use.
One receiver, built for the field
Rugged, waterproof and accurate. Connect any phone or tablet to the UNI’s Wi-Fi hotspot and run UNI-Collect, or the software of your choice. The UNI-GR2 also connects over Bluetooth, serial, USB, 4G and LoRa, so it fits the way you already work.
- 1408Channels, six constellations
- 8 mmRTK horizontal, plus 1 ppm
- 10,400 mAhBattery, charges over USB-C
- 10+ hoursUp to a full working day
- 800 gReceiver on the pole
- IP67Waterproof, -20 to +55 °C
Six constellations
GPS, GLONASS, Galileo, BeiDou, QZSS and NavIC on many frequencies, with SBAS support for a reliable fix. 1408 channels in one receiver.
Works as rover and base
Run it as a rover on UNI-RTK Premium, or set it up as a base to feed corrections to another UNI. Both work out of the box.
Use any controller
Connect any phone or tablet to the UNI’s Wi-Fi hotspot and run UNI-Collect. Drop in a SIM and the receiver uses 4G in the field.
Use the software you like
Run UNI-Collect on your own phone or tablet, or pair the receiver with the software you already use. Open interfaces and a standard NMEA output keep the choice yours.
Ready for any environment
IP67 waterproof and rated from -20 to +55°C. It keeps measuring in rain, dust and cold.
Gets you through the day
A built-in 10,400 mAh battery runs 10+ hours, up to a full working day. At 800 grams it stays light on the pole.
Trusted by 1000+ companies
More than 10 million objects measured, in more than 40 countries.
Everything under the hood
GNSS receiver
| Channels | 1408 |
| GPS | L1C/A, L1C, L2P(Y), L2C, L5 |
| GLONASS | G1, G2, G3 |
| Galileo | E1, E5a, E5b, E6 |
| BeiDou | B1, B2, B3 |
| QZSS | L1C/A, L1C, L2C, L5 |
| NavIC | L5 |
| SBAS | WAAS / EGNOS / GAGAN / MSAS |
Accuracy (RMS)
| Standalone horizontal | 1.5 m |
| Standalone vertical | 2.5 m |
| DGPS horizontal | 400 mm |
| DGPS vertical | 800 mm |
| Static horizontal | 3 mm + 1 ppm |
| Static vertical | 6 mm + 1 ppm |
| RTK horizontal | 8 mm + 1 ppm |
| RTK vertical | 15 mm + 1 ppm |
Connectivity
| 12-pin connector | Charging, RS232, CAN, Host USB, PPS, Event |
| USB-C | USB Power Delivery, charging, data transfer |
| 4G mobile data | LTE, EDGE, GPRS, GSM, HSDPA+ UMTS |
| Wi-Fi | 802.11 a/b/g/n/ac |
| Bluetooth | 4.2 |
| NFC | Yes |
| Radio | LoRa 868 / 915 MHz |
Mechanical & performance
| Level and tilt | 9DOF level LED ring and tilt compensation to 45°. Tilt accuracy 10 mm + 0.7 mm per degree. |
| Internal battery | 10,400 mAh |
| Battery life | 10+ hours (up to 12 h) |
| Weight | 800 g |
| Water & dust proof | IP67 |
| Operating temperature | -20 to +55 °C |
| Position output | NMEA-0183 |
The UNI-GR2 fits straight into our packages
Buy the receiver on its own, or as part of a complete set. The UNI-GR2 sits at the heart of all three, and works with UNI-Cloud and UNI-RTK Premium either way.
Digital surveying
UNI-Collect Survey Package
complete survey package, excl. VAT
The UNI-GR2 with tablet, mount and pole, plus a year of UNI-Cloud, support and UNI-RTK Premium. Everything you need to start surveying.
3D scanning
UNI-Collect 3D Package
complete 3D package, excl. VAT
The UNI-GR2 with an iPad Pro and LiDAR, so you capture point clouds and 3D detail alongside your normal survey work.
Machine control
UNI-Machine Control
from complete excavator package, excl. VAT
Two UNI-GR2 receivers, machine sensors and a control box, so the operator sees exactly where to dig without waiting for a surveyor.
Everything the receiver does, grouped
Survey, set out, import, export and share, with the UNI-GR2 in UNI-Collect and UNI-Cloud. What is not there yet is marked as such.
Measure
- Points, lines and areas, with offsets on all three.
- Enter a point by hand.
- Length in 2D and 3D, per segment and the angle to the previous one.
- Area, and volume over a surface.
- Averaging over a set recording time.
- Your own pole height, and tilt compensation up to 45 degrees.
Set out
- Points, lines and areas.
- A direction arrow to the target point.
- Values to the centimetre.
- A warning when accuracy drops.
- Save what you set out, or update the existing point.
Import and export
- In: CSV, TXT, DXF, DWG, LandXML, GeoJSON, KML and ESRI Shapefile, or a ZIP with a set of files.
- A full AutoCAD drawing with automatic layer mapping, names and colours kept.
- Out: DWG, DXF, LandXML, CSV, TXT and GeoJSON, in 2D or 3D.
- Per layer, or the whole project at once.
Background and reference data
- Cadastral lines for the Netherlands, Belgium and Germany.
- Large drawings as a fast background layer, in the field and in the cabin.
- WMS layers supplied by us on Professional, your own source on Ultimate.
- A coordinate system per country, set when you create the project.
- Transformation grids on the tablet.
Photos and 3D
- Photos on a point or a shape, with EXIF, syncing on their own.
- LiDAR 3D scanning with an iPad Pro, with the UNI-GR2 for accuracy.
- Scans and photos on the map in UNI-Cloud, in a 3D viewer.
- Photos and scans land on the map on the centimetre, on the position of the UNI receiver, not on the tablet's own GPS.
Share and work together
- A public project link or a QR code, no account needed on the other side.
- Users, groups and rights.
- Real-time sync.
- An API and WebSockets for your own integration.
Coming soon: basic CAD drawing in UNI-Cloud. PDF reports are in the works.
KLIC notifications in the field and on the map
Your KLIC data sits in the same project as your measurements, in the field and in the office.
- KLIC viewer as a layer over your project in UNI-Cloud.
- Open and download KLIC documents from UNI-Cloud.
- Use imported GeoJSON as a KLIC layer.
- Use KLIC codes in UNI-Collect on the tablet.
- Also visible in UNI-Machine in the cabin.
Available from UNI-Cloud Professional.
Where all your field work comes together
Every point, line and project syncs to UNI-Cloud. Plan the work, share with the office and clients, and keep the field and the desk on the same page.
- Import and export DWG, DXF, LandXML, CSV, TXT and GeoJSON
- Measure length, area and volume
- Share a project with a link or a QR code
Everyone who works in the project gets their own login.
UNI-Cloud is included in the UNI-Collect Survey Package for the first year.
Draw straight in the cloud and send a finished PDF report to your client.
Import and export
Bring in a full AutoCAD drawing and export to DWG, DXF, LandXML, CSV, TXT or GeoJSON.
Projects
Set up layers and attributes once, use them in the field.
Real-time sync
Field data in the office the moment you save.
Share your results
Send a project to your client with a link or a QR code.
Layers and attributes
Set them up once in the office. In the field your crew picks them from a list, so every point lands in the right layer.
Drag and drop your files
Drop a drawing or a point file straight into the project. It is on the tablet at the next sync.
Import and export
Bring in a CSV of coordinates and set out from it. Export your results to AutoCAD, CSV or LandXML.
What our customers say
“Measuring tapes are a thing of the past. With the UNI-GR2 we are now able to equip every worker, foreman or technician in the field with an easy to use receiver to survey.”
Heijmans
The Netherlands
“By using the UNI-GR2 and combining it with our GIS tools, we have been able to work more efficient. On fibre optics projects, we are now able to skip about 50 process steps!”
BAM Infra Telecom
The Netherlands
“The stake-out function saves us a lot of time, with quick loading of points and lines. It’s easy to use, which is a big plus. We use the UNI-GR2 for baseline measurements, construction work, and sewer projects, and we’re very satisfied with it.”
T. Van de Haterd
The Netherlands
Support that keeps you working
Our own support team in Hilversum answers the phone during office hours, on a local number in the Netherlands, Germany and the UK. Those three numbers are an extra, not a limit: we help customers worldwide, by phone, email and chat, in several languages. What customers tell us most is that we keep them moving. Someone picks up a kit from a colleague, has never used it before and calls to ask how to set it up: that is usually sorted on the phone in a few minutes. If talking it through is not enough, we can take over the receiver remotely and look at it with you. For the harder cases we stay on it until you can get on with your work.
- Email and chat support on every plan.
- Phone support and remote assistance from Professional.
- A replacement receiver if yours fails, on Ultimate.
Frequently asked questions
It is the receiver that gives you a centimetre-accurate position in the field, on a pole with UNI-Collect for surveying and setting out, or on an excavator for machine control. Measure cables and pipes, set out from a drawing, check levels, and record as-builts.
In the open field 8 mm + 1 ppm horizontal and 15 mm + 1 ppm vertical with an RTK fix, and 3 mm + 1 ppm horizontal in static mode. Close to buildings or trees, where the sky view is limited, expect closer to 2 cm in real conditions.
1,408 channels across five systems: GPS, GLONASS, Galileo, BeiDou and QZSS. It gets a first fix in seconds and updates the position many times a second, which keeps it reliable on a busy site.
No. The built-in tilt sensor lets you survey with the pole tilted up to 45 degrees, so you reach points against a wall or in a trench without levelling.
Any NTRIP service. Use our UNI-RTK Premium network, or your own service such as SAPOS or FLEPOS, which are free and save you the € 1.000 a year that UNI-RTK Premium costs. The receiver can also act as a base station for other rovers.
Yes. It pairs with UNI-Collect, and with third-party survey apps that accept a Bluetooth NMEA-0183 receiver. It also outputs corrections as a base for non-marXact rovers. Open on both sides.
Over WiFi, Bluetooth or cable, with a built-in 4G connection and WiFi hotspot, and it charges over USB-C. One battery lasts a full working day.
Yes. It outputs over CAN bus for machine guidance and is used in the UNI-Machine setup on excavators.
Yes. It is made for outdoor work in dust, rain and cold, runs a full day on one charge, and takes the knocks of a normal working day on site.
€ 3.295 for the receiver. Most people buy it as part of a package with the app, cloud and corrections, but you can buy it separately.
Developed in-house in Hilversum and produced in Rotterdam, the Netherlands. European build quality, one company behind the receiver, the app and the cloud.
Yes. We’re happy to show you the system first with a no-obligation demo on location: at your job site, at your company, or at our office. When we deliver, we walk through it together so you can start right away. On-site training is available if you want it, but it’s not a must: if you can use a smartphone, you can work with this. Think of it as extra certainty that you get everything out of it. And you can always call us.
Ready to survey with the UNI-GR2?
Book a demo and we’ll show you how the receiver works on your own site, with your own tools.
Or call us: +31 (0)70 700 7917