Reach RS4

All-band RTK GNSS with fast tilt – built for real sites

Reach RS4 delivers centimetre-level accuracy with a faster, more forgiving field workflow. This RTK GNSS receiver helps crews stay productive in real site conditions, with quick setup and reliable fixes day-to-day. The next-gen IMU enables fast tilt compensation so you can measure when the pole isn’t perfectly vertical, while all-band GNSS tracking (L1/L2/L5/L6) improves performance in mixed-sky environments.

Paired with Emlid Flow / Flow 360 on iOS or Android, Emlid Reach RS4 keeps teams moving from setup to export – whether you’re running network corrections or working fully self-contained. If you need a dependable survey grade GNSS receiver that supports efficient measuring and consistent results, Reach RS4 is built to fit the way modern crews work.

Why teams choose RS4

• Centimetre accuracy, simplified – connect to NTRIP or run base/rover and get to work fast.

• Fast tilt compensation – next-gen IMU initialises quickly, reducing time between shots.

• All-band, all-constellation – L1/L2/L5/L6 support across major GNSS for stable fixes in canopy/urban sites.

• Rugged & ready – IP68 magnesium-alloy housing stands up to dust, rain, and hard knocks.

• Flexible comms – LTE, Wi-Fi, Bluetooth, and multi-band radio for reliable corrections on or off-grid.

• Field-to-office workflow – seamless with Emlid Flow (mobile) and Flow 360 (web) for coding, stakeout, sync, and export.

Ideal applications

Topographic survey • Construction set-out • Utilities & asset capture • Landscaping • As-built checks • Infrastructure maintenance.

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