Reach RS4 Pro

All Emlid receivers offer centimeter-level accuracy (1 cm ≈ 0.39 in). The Reach RS4 Pro also features tilt compensation, allowing you to maintain the same level of accuracy even if the pole is tilted.

The dual camera feature provides two functions: AR guidance and measurement from photos.

With the RS4 Pro, stakeout becomes visual. Rather than just following coordinates on a map, your designs are overlaid directly onto the real world, clearly showing where to place stakes.

You can also use the cameras to measure building facades, areas behind fences, across busy roads, and any other inaccessible points.

The RTK technique allows you to get cm-level (sub-inch) accuracy, but requires a receiver (rover) and a source of corrections (a base), which can be another receiver or a correction service. Both are valid approaches. Two receivers can communicate with each other via radio or internet, giving you full independence, and are great for permanent or semi-permanent setups.

A correction service, also called an NTRIP/VRS service, always requires an internet connection, but allows you to skip the base station logistics entirely and move between job sites freely.

If you want to explore the second option, check Emlid Corrections — a professional VRS NTRIP service, built into Reach receivers, providing cm-level (sub-inch) accuracy out of the box. The first year is included for free.

The Reach RS4 Pro offers a dual camera system, tilt compensation and all-band support, all of which are useful for construction work. It provides a stable fix, even in areas with a lot of interference. Tilt compensation saves time by eliminating the need to level the pole during stakeout. One of the dual camera features, AR guidance, helps you stake out even faster because it makes everything visual. Another useful feature is the ability to measure points you can’t reach, even with tilt compensation, allowing you to stay safe from hazardous areas.

The software could also be instrumental in decision-making. Each Reach RS4 Pro device comes with the Emlid Flow mobile and cloud app, which has all the features required for construction applications.
- Topo surveys
- Gathering terrain and elevation data
- Design layout and stakeout
- Staking centre lines, offsets and curves with precision for road construction
- Cut and fill calculations
- As-builts

The Emlid Flow 360 cloud also allows you to create a workspace for your team, monitor field progress in real time from the office, and ensure that everyone is working with up-to-date data.

Yes. The Reach RS4 Pro is a professional GNSS receiver that is also intuitive and easy to learn. All team members, whether professional surveyors or not, can get started with it quickly without complicated training or lengthy manuals.

The Reach RS4 Pro also comes with the Emlid Flow mobile and cloud app, which offers not only data collection features, but also tools for seamless collaboration and teamwork.

- Create a shared workspace, invite team members, and manage access to secure data ownership.
- Monitor field progress from the office and exchange data instantly with real-time sync.
- Ensure the whole team is working with the latest data.

Reach RS4 Pro is designed for ease of use, requiring no specialized training. Its plug-and-play functionality allows both professional surveyors and non-surveyors to operate the device effectively without additional setup.

We offer an extended documentation section that covers all essential topics, including getting started, base setup, and integrations. Additionally, you will receive onboarding emails to guide you through your first steps with the equipment.

We also provide lifelong technical support for all Reach users, delivered by our team of Application Engineers. Contact us at [email protected].

If your unit is not functioning as expected, please contact us at [email protected] so we can assist with troubleshooting.

If a unit is found to be defective or does not meet specifications during the warranty period, we will provide a replacement. A new unit will be shipped within one month after examination, free of charge. If a replacement is not possible, a full refund will be issued within one month after the unit’s examination.

For more details, please refer to our Terms and Conditions.

The Reach RS4 Pro has all the capabilities of the Reach RS4, plus dual cameras for stakeout with augmented reality and measurements from photos.