Emlid Reach RS4 RTK GNSS Receiver with Tilt Compensation

Reach RS4
All-band RTK GNSS receiver. Ultimate precision, even in the most challenging conditions.

High-accuracy, even under canopy
The Reach RS4 can track all available satellite constellations and frequencies, including the lower L5 and L6 bands, which are more resistant to multipath and interference. With 672 channels, it can track 40+ satellites at a time. These features ensure reliable performance and centimeter-level precision

• 7mm + 1 ppm in RTK
• 672 channels
• L1/L2/L5/L6
• Fix in less than 5 seconds
• GPS, GLONASS, Galileo, BeiDou, QZSS, NavIC

Next-gen tilt compensation
The Reach RS4 delivers accurate results even at high tilt angles - for example, a 30 Degree tilt still achieves 18 mm precision. The compensation mechanism activates with just a few moves and remains stable throughout the survey, saving time and avoiding the need for recalibration.

• Factory-calibrated
• Immune to interference
• Faster initialization
• No angle limit

Quick release mount
This mount is specifically designed for tilt compensation, eliminating backlash and securing the receiver firmly to the survey pole. Even a small amount of wobble between the device and the pole can compromise the accuracy when tilting. The quick-release system provides a fast and reliable connection for maximum precision.

Base and rover

NTRIP
Work in RTK with VRS or a single baseline CORS network in RTCM3 format. You can also connect another GNSS receiver as an NTRIP base using Emlid NTRIP Caster

Dual-band radio
• UHF 450 MHz
• Transmit and receive
• Up to 2W (may require a license)
• Compatible with Reach and 3rd-party receivers with TRIMTALK 450S support

LoRa 915 MHz
• Transmit and receive
• Up to 1W (license-free in North America)
• Compatible with Reach receivers

Built to perform in extreme conditions

Magnesium alloy body
The RS4's magnesium alloy body is as strong as it is lightweight. This material is often used for aerospace equipment and high-end electronics. It strikes the perfect balance of durability and lightness, making it ideal for use in tough conditions while remaining easy to handle.

16 hours on one charge
The RS4 offers an impressive battery life of up to 16 hours on a single charge. Use the USB-C for recharging or use a power bank for even greater flexibility. Designed to keep working as hard as you do, without interruption.

Waterproof
Thanks to its IP68 rating, the RS4 is fully dustproof and waterproof. Whether it's raining, snowing or a dusty construction site, the Reach RS4 will keep working.

-40 to +65 Degree C
The Reach RS4 operates in temperatures from -40 Degree C to +65 Degree C. Its performance remains excellent in both freezing cold and scorching heat.

Software for every stage of your project
The Reach RS4 comes with Emlid Flow, a comprehensive mobile and cloud solution compatible with both iOS and Android. It keeps your team aligned and your projects on track while supporting various site tasks.

Coordinate your team
• Invite team members, share projects and manage access
• Monitor field progress from the office and exchange data instantly with real-time sync
• One workflow for the whole team, with data that is always up to date, a consistent interface, and no additional training required

Execute projects on site
• Topographic surveys - gather terrain and elevation data accurately
• Stakeout & layouts - place points, lines, and markers directly in the field
• Line & road surveys - stake centerlines and offsets with precision
• Cut & Fill calculations - measure earthworks and stockpiles on site
• As-built verification - check constructed structures against your plans