Emlid Reach RS4 Pro

Next-generation multi-band RTK GNSS with vision-powered workflows. The Reach RS4 Pro delivers centimetre-level accuracy and introduces AR stakeout and image-based measurement to speed up work on real sites - especially for points that are obstructed or hard to access.

Why RS4 Pro

• Vision toolkit: Dual cameras enable AR stakeout and image-based measurements so you can capture where you can’t stand.

• All-band, all-constellation: Tracks L1/L2/L5/L6 across major GNSS systems for stable, high-precision fixes.

• Fast tilt compensation: Next-gen IMU with 5× quicker initialisation keeps you moving between shots.

• Built for the field: IP68 magnesium-alloy body with LTE, Wi-Fi, Bluetooth, and multi-band radio for flexible comms.

• Simple workflow: Works with Emlid Flow / Flow 360 on iOS & Android for setup, coding, stakeout, and sync.

Emlid Flow Software 

The EMLID Reach RS4 Pro is fully compatible with Emlid Flow, the intuitive field data collection app available for iOS and Android. Emlid Flow allows you to collect, stake out, and manage survey data directly from your smartphone or tablet, with a clean interface designed for both professionals and first-time GNSS users. Simply connect your RS4 Pro via Bluetooth and you're ready to start capturing accurate field data in minutes.

RTK Credits

For centimetre-level accuracy without a base station, the RS4 Pro supports Network RTK corrections via NTRIP. To get started with RTK positioning, visit our Network RTK Corrections page for details on available correction services and how to configure your receiver.

Specialist survey support (OR3D GEO)

We’ll help you integrate the RS4 Pro into your workflows - end-to-end capture advice, Emlid ecosystem setup, and data-processing support from our in-house team.

Order Reach RS4 Pro today.