The world of geospatial data collection is taking a monumental leap forward. On October 6, 2025, Emlid officially launched the next evolution of its renowned GNSS receiver lineup: the Reach RS4, Reach RS4 Pro, and Reach RX2. Building on a reputation for making high-precision technology accessible, this new generation is engineered on a completely redesigned platform that prioritizes speed, ruggedness, and collaborative workflows.

This launch marks the most significant update since the release of the popular Reach RS3, introducing a trio of devices tailored to diverse professional needs. From the robust, all-environment Reach RS4 to the vision-enabled Reach RS4 Pro with its groundbreaking camera technology, and the ultra-portable Reach RX2, Emlid is setting a new standard for how surveyors, GIS teams, and construction firms capture and utilize centimeter-level data.

A Generational Leap: Core Upgrades Across the New Lineup

While each new receiver has unique strengths, they share a foundation of powerful next-generation technology that delivers tangible benefits in the field. These core upgrades represent a paradigm shift in performance and reliability.

All-Band GNSS for Uncompromised Performance

The most significant advancement in the new series is the move to a powerful, all-band GNSS engine. Both the RS4 and RS4 Pro are equipped with an incredible 672 channels, a massive increase from the 184 channels in the RS3. This allows them to track all available satellite constellations (GPS, GLONASS, Galileo, BeiDou, QZSS, NavIC) across every major frequency, including L1, L2, L5, and L6 bands.

·          Faster Fix Times: Achieve a reliable RTK fix in less than 5 seconds, matching or exceeding the performance of high-end systems.

·          Superior Performance in Tough Conditions: The ability to track more satellites and frequencies, especially the interference-resistant L5 and L6 bands, ensures a stable and accurate fix under dense tree canopies, in urban canyons, or near other obstructions. As noted by theEmlid community, this gives the RS4 a distinct advantage over the RS3 in challenging environments.

·          Enhanced Multipath Resistance: The advanced antenna and multi-band tracking significantly improve signal retention and reduce errors caused by reflected signals from buildings and other surfaces.

Next-Generation Tilt Compensation: Work Faster, Not Harder

Emlid's tilt compensation has always been a workflow accelerator, and the RS4 series refines it to near-instant readiness. The new receivers feature a next-generation IMU (Inertial Measurement Unit) that is up to five times faster to initialize than its predecessor.

·          Instant Initialization: The compensation mechanism activates in just a few seconds with a few natural movements of the pole.

·          Factory-Calibrated and Magnetically Immune: The IMU is calibrated at the factory and is immune to magnetic interference, eliminating the need for time-consuming field calibrations and ensuring consistent accuracy.

·          Confidence at Any Angle: Surveyors can now capture points in hard-to-reach places—next to walls, under vehicle chassis, or in trench corners—without needing to keep the pole perfectly plumb. The system delivers remarkable precision, achieving just 18 mm of accuracy even at a 30° tilt, according toEmlid's official specifications.

The Quick Release Mount: A Foundation for Accuracy

To complement the advanced tilt compensation, Emlid has designed a newQuick Release Adapter. This mount is specifically engineered to eliminate backlash—the small, almost imperceptible wobble between the receiver and the survey pole. Even minor movement can compromise accuracy when tilting, and this secure, firm connection ensures that the IMU's measurements are translated into precise coordinates on the ground.

Rugged by Design: Built for the Real World

The RS4 and RS4 Pro are built to endure the harshest field conditions. The housing has been upgraded from polycarbonate to a lightweight yet incredibly strong magnesium alloy, a material often used in aerospace for its durability and thermal stability. This not only makes the receiver tougher but also lighter, with both models weighing in at just 920g.

Environmental protection has also been enhanced:

·          IP68 Rating: A step up from the RS3's IP67 rating, the RS4 series is fully dustproof and can withstand continuous immersion in water.

·          Extreme Temperature Range: The receivers are rated to operate in temperatures from -40°C to +65°C, ensuring reliable performance in freezing cold and scorching heat.

·          Long-Life Battery: A powerful 5000 mAh Li-Ion battery provides up to 16 hours of operation as an RTK rover with tilt, enough for two full workdays. It supports USB-C Power Delivery for fast charging, even from a power bank in the field.

Emlid Reach RS4: The New Workhorse

TheEmlid Reach RS4is the new standard for reliable, high-precision surveying in any environment. It packages all the core generational upgrades—all-band GNSS, next-gen tilt, and a rugged magnesium body—into a powerful and dependable tool for daily fieldwork.

One of its most significant upgrades is its expanded radio capability. Unlike the RS3, which only supported receiving on the UHF band, the RS4 features transmit and receive functionality on both LoRa and UHF radios. This dual-band, dual-direction design allows the RS4 to function seamlessly as either a base or a rover without requiring external radios, simplifying setups for teams working across large or obstructed job sites.

Ideal Applications:

·          Topographic and land surveys

·          Construction layout and as-built verification

·          GIS data collection and asset mapping

·          Road and line surveys

·          Volume calculations for earthworks and stockpiles

Reach RS4 Specifications:

Emlid Reach RS4 Pro: Surveying with Vision

TheEmlid Reach RS4 Prois the flagship of the new lineup, taking everything great about the RS4 and adding a transformative dual-camera vision system. This isn't just a receiver with cameras; it's a visual surveying platform that blends centimeter-level GNSS accuracy with real-time visual context, creating entirely new workflows that are faster, safer, and more intuitive. The RS4 Pro integrates two factory-calibrated, Full-HD global shutter cameras that power two revolutionary features:

AR Stakeout

Forget staring at a 2D map and trying to interpret distances and directions. With AR Stakeout, survey points and linework from your project are overlaid directly onto a live camera feed in the Emlid Flow app. The display dynamically switches between the front and bottom cameras, providing visual guidance that makes navigating to points effortless. This is especially powerful on complex construction sites or for road layouts, helping teams identify stakeout points faster and with fewer errors.

Image-Based Measurement

This feature empowers surveyors to capture points that are physically inaccessible or hazardous to reach. By taking photos of an object from different angles, the system can automatically calculate its coordinates. This is a game-changer for measuring points across a busy road, behind a fence, on a building facade, or over a pit. As described byAdvexure, it removes the need for secondary tools like total stations for many common measurement tasks.

Reach RS4 Pro Specifications:

The RS4 Pro shares the same core positioning, GNSS, connectivity, and physical specifications as the RS4. The key addition is its imaging system.

Emlid Reach RX2: Precision in Your Pocket

TheEmlid Reach RX2is designed for teams that need a simple, ultra-portable, and quick-to-deploy RTK rover. Building on the success of the original Reach RX, the RX2 keeps the lightweight, pocket-sized design while adding professional-grade features that were previously reserved for larger units.

It's the perfect tool for large teams or diverse projects where simplicity and speed are paramount. There are no complex settings to configure; it connects straight out of the box to deliver centimeter-level accuracy. The two biggest upgrades are:

·          All-Band GNSS: The RX2 now features the same 672-channel, all-band engine as its larger siblings, ensuring reliable performance in obstructed areas.

·          Tilt Compensation: The addition of the second-generation IMU allows for accurate, level-free measurements, dramatically speeding up data collection for GIS and asset management tasks.

Ideal Applications:

·          GIS data collection

·          Utility and asset management

·          Quick checkpoints and construction tasks

·          Mobile scanning with apps like Pix4Dcatch

Comparison: RS4 Pro vs. RS4 vs. RX2

To help you decide, here is a summary of the key differences between the three new models.

The Emlid Ecosystem: Seamless Field-to-Office Workflows

Hardware is only half the story. The new receivers are deeply integrated with Emlid's powerful and user-friendly software suite, creating a seamless workflow from project setup to final deliverable.

Emlid Flow and Flow 360

Emlid Flow 360is a cloud-based web app where you can create and manage survey projects, set up coordinate systems, and manage code libraries from your office. These projects are then instantly synced to the Emlid Flow mobile app on your phone or tablet. In the field, Emlid Flow handles receiver configuration, data collection (points and lines), and stakeout.

The software is available in two tiers:

·          Standard (Free): Includes all core features for collecting and staking out points, managing coordinate systems, and controlling the receiver.

·          Survey (Subscription): Unlocks advanced features like collecting and staking out linework, on-the-fly coding, and using satellite map backgrounds.

Emlid Studio for Post-Processing

For workflows that require post-processing (PPK),Emlid Studiois a free, cross-platform desktop application. It simplifies the process of combining RINEX logs from a base and rover to achieve precise coordinates. It also includes a powerful tool for geotagging drone images, making it an essential part of any drone mapping workflow.

Ready to experience the next generation of surveying? The new Emlid Reach receivers are available for pre-order now.

Which Receiver is Right for You?

Emlid's new lineup is designed to be scalable, serving everyone from individual surveyors to large construction and GIS teams. Here’s a quick guide to help you choose:

·          Choose the Reach RX2 if: You are part of a large team needing multiple, easy-to-use rovers for tasks like GIS data collection, asset management, or quick construction checks. Its portability and simplicity are its greatest strengths.

·          Choose the Reach RS4 if: You need a robust, all-around performer for a wide range of surveying and construction tasks. Its powerful radio, rugged build, and ability to act as both a base and rover make it the versatile workhorse of the lineup.

·          Choose the Reach RS4 Pro if: Your work involves complex stakeouts, measuring inaccessible points, or documenting as-builts in hazardous environments. The AR and image-based measurement tools will fundamentally change your workflow, saving time and improving safety.

The launch of the Reach RS4, RS4 Pro, and RX2 is more than just a product update; it's a statement about the future of surveying. By combining professional-grade precision with consumer-level simplicity and innovative vision technology, Emlid continues to democratize high-accuracy positioning, empowering professionals to work faster, safer, and more efficiently than ever before.

This content was generated based on publicly available information as of 2025-10-25. For the most current details, pricing, and availability, please visit the officialEmlid website.

References

[1]Reach RS4 High Precision GNSS & GPS Receiver - Emlid https://emlid.com/reachrs4/

[2]Reach RS4 Pro – GPS Receiver with Dual Camera & AR | Emlid https://emlid.com/reachrs4pro/

[3]Emlid Reach RS4 Pro vs RS4 vs RS3 - Advexure https://advexure.com/blogs/news/emlid-reach-rs4-rs4-pro-vs-rs3?srsltid=AfmBOor-b-OuY6VOKyfBxidkKH_QaTnR0qUtxY8chuQbiGEzrDDWZoMD

[4]Flow 360 Land Surveying Software - Emlid https://emlid.com/emlidflow360/

[5]Emlid launches Reach RS4 Pro, RS4, and RX2: A new generation of ... https://www.heliguy.com/blogs/posts/emlid-launches-rs4-pro-rs4-rx2-rtk-gnss-receivers/

[6]Buy the Quick Release Adapter for Reach receivers - Emlid Store https://store.emlid.com/products/quick-release-adapter

[7]RS3 vs RS4 under canopy? - Emlid Community Forum https://community.emlid.com/t/rs3-vs-rs4-under-canopy/43705