Emlid Reach RS4 and Reach RS4 Pro

By jnally on 21 October, 2025

Emlid has introduced a range of new, all-band RTK GNSS receivers, including the Reach RS4, and the Reach RS4 Pro with AR and camera capabilities, both of which promise improved workflows and quicker surveys.

Key features include:

All-band RTK reception (L1/L2/L5/L6) across all satellite systems for performance in urban canyons, under dense canopies and in other difficult conditions.
Integrated antenna system with diversity LTE, dual-band Wi-Fi, and Bluetooth for a clean GNSS signal and stable fix solution.
Emlid multi-band radio system up to 2W, interoperable with third-party gear for sending and receiving corrections. The radio supports both licensed and license-free operations at 450 MHz and 915 MHz. This allows users to adapt to project needs while staying compliant with regulatory requirements.
Next-generation IMU tilt compensation with up to 5 times faster initialisation.
Durable design with a magnesium alloy body, IP68 protection, and user-replaceable bumpers to secure the receiver from the scariest falls.
Made for iPhone certification for compatibility with iOS apps, including Esri ArcGIS apps.
Innovative quick release mount for a survey pole, ensuring accuracy and speed, even when tilted. Сompatible with standard 5/8″ thread.

Building on the RS4 platform, the Reach RS4 Pro adds vision capabilities. With dual, factory-calibrated full HD cameras, it delivers:

AR stakeout — an intuitive, augmented-reality guidance for fast and easy navigation to the points. Any geometry from the project can be projected in AR in the Emlid Flow app.
Measurement from images — a new solution to capture inaccessible points safely and quickly, be it on a façade or in the middle of a highway. The images taken directly from the receiver’s camera are processed in Emlid Flow to provide accurate coordinates.