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marXact UNI-GR1

The most universal GNSS receiver!

With open protocols, loads of connection methods and simple controls the UNI-GR1 is the perfect choice for any user. Competitively priced at €2995,- it get's you going anywhere! Whether you want to simply store some points, integrate a location input in your own GIS tools or connect it to your machinery; the UNI supports it. And, by receiving GPS, Glonass, Galileo and Beidou on 432 Channels and multiple (L1/L2/L5) frequencies you don’t have to worry about getting a good fix!

  • marXact UNI-GR1
Marathon 3
1213PB Hilversum
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The RTK GNSS Receiver with CM accuracy, UNI-GR1. Priced at € 2995,- it's the most universal, cost-efficient receiver on the market, making centimetre accurate positioning input in your own software environment possible! And, combined with the UNI-Cloud it offers a complete solution, including a surveying app and RTK corrections!


Survey & Mapping

Point Collection

Start collecting your centimetre accurate points with the free UNI-Connect interface! Or, connect the UNI RTK GNSS Receiver to the app of your choice and start collecting points with centimetre accuracy to deliver on your projects. Being universal, the UNI supports many free or paid apps for mapping & surveying to make sure you got the complete set in hand to collect your data.


Depending on the scope of your project, you should be able to choose the right workflow. Apart from doing a stakeout in the free UNI-Connectsoftware, working on any device, you can choose the app you want to use for your stakeouts. Simply connect the UNI over one of the many connection methods to your chosen app and get going, whether that is with an extensive paid software package or a simple free app; the UNI will support it!

An app for everything!

Living in a time where there is an app for everything, you should be able to connect your RTK GNSS Receiver to all of these apps and with the UNI you can! With Bluetooth, WiFi, Mobile Data, cabled connections, UNI-Cloud, NMEA, RINEX and other interfaces we make sure you can connect your app and device of choice to a CM accurate GNSS receiver; the UNI-GR1


Infra, Construction & More

Everyone can measure!

With the cost as well as the ease of use of the UNI, everyone within your company can do centimetre accurate measurements. Whether you need your foreman to survey a point, your planner to stakeout a new project or your maintenance worker to find the location of an outage on it’s own; the UNI is the tool that get’s it done. With UNI-Connect you can do the basics or you can connect it to the right app for your company and you are good to go!

Deliver on the spot!

Measure the work you have just done and immediately deliver the results to your client in the requested format. Or, with the many integration possibilities, work directly in your own or your clients database or systems. With the universal setup of the UNI and UNI-Cloud, you can design your own workflows according to your company or client standards and automate your measurements.

A solution for every market!

Survey, Mapping, Infra, Construction and many more; since the UNI is a universal solution, offering many connection methods and letting you choose the software you like to use, the UNI is not limited to any market and can be used as far as creativity goes. Whether you install it on a tractor, a boat, measure points in the desert, stakeout a fibreglass project in the outback or monitor the Eiffel tower; we are sure there is an app that sorts your needs which you can connect to the UNI for your location!


Machinery & Integrations

Connect your machinery!

Through one of the many connection methods, you can connect your machinery to the UNI where the UNI provides the centimetre accurate location input to your autopilot, auto-steer, drone controller, tractor, UAV or any other machinery you may think of that needs a location input to get going.

Work in the cloud!

Leave your UNI RTK GNSS Receiver in the field and monitor the results from the office, download logs without connecting to the UNI and always have your data and settings safely stored. The UNI-Cloud let’s you sync your UNI at any time it’s online so you never lose your settings or data. Multiple users or projects? Control settings, profiles and device access per user or per project, making sure efficiency is achieved and nothing goes wrong on the job.

Integrate in your own environment!

By subscribing to the UNI-Cloud you get access to the constantly developing UNI-Cloud API so you can set up your environment to work with your UNI RTK GNSS Receiver. Make sure your data is automatically stored to your own servers and work with the UNI’s accurate location from your own software. We are always developing and looking to help your software or devices get smarter, we would love to hear where we can help you improve your processes!


  • Type
    Aerial, Land, Marine
  • Year of initial introduction
  • Height [m]
  • Depth [m]
  • Width [m]
  • Total weight [kg]
  • External power supply
    18V / 1.33A DC Adapter or 5V / 0.5A Mini-USB Cable
  • Operating time with internal power supply [hr]
  • Certifications
  • Rechargeable with (auto)battery
  • Direct car connection cable available
    Yes, available upon request
  • Internal power supply
    Li­ion battery: 2 × 5200 mAh
  • Operating temperature: min. [°C]
  • Humidity resistance
  • Water sand and dust proof
  • Shock and vibration proof
    2 meter pole drop
  • ROHS compliance
  • WEEE compliance
  • Operating temperature: max. [°C]
  • No. channels
  • Max. simultaneous tracked channels
  • Tracked satellite signals
    GPS (L1/L2/L5), Glonass(L1/L2), Galileo (E1 / E5a / E5b), Beidou (B1/B2/B3)
  • SBAS differential signals
  • RTK Network Compatibility
  • code: DGNSS/RTC (constant part) [m]
  • phase: RTK kinematic (constant part) [m]
  • phase: RTK kinematic (variable part) [ppm]
  • phase: static post processing (constant part) [m]
  • phase: static post processing (variable part) [ppm]
  • Memory medium
  • Data capacity [MB]
  • Communication ports
    RS232, USB, Micro-USB, CAN,
  • Simultaneous links
  • PPS Out
  • Bluetooth
  • Radio modems
    868MHz / 915 MHz
  • GSM; UMTS phone modems
  • RTCM standards for differential data
    RTCM 2.x / RTCM 3.x
  • Other formats for differential data
    UNI Binary / UNI-Cloud
  • NMEA output format
    NMEA-0183 / NMEA-2000
  • other output formats
  • L-Band Compatible
    L1 / L2 / L5
  • Distinguishable features
    9 Degrees of Freedom powered level LED - Ring, WiFi, UNI-Cloud, compatible with most other devices.

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