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. The next-gen IMU enables quick tilt compensation so you can measure when the pole isn’t perfectly vertical, while all-band GNSS tracking (L1/L2/L5/L6) boosts reliability in mixed sky conditions. Paired with Emlid Flow / Flow 360 on iOS or Android, RS4 keeps crews moving from setup to export.

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.