EMLID REACH RS4

Emlid Reach RS4 is a new generation multi-frequency RTK GNSS receiver designed for topographic surveys, GIS, and precision agriculture, offering centimeter-level accuracy even under dense canopy and in challenging environments. Thanks to its high-performance antenna, integrated IMU TILT, and radio, LTE, and NTRIP connectivity, it enables fast, reliable, and highly productive operations on site.

Product Overview

Reach RS4 is an all-band RTK GNSS receiver capable of tracking all major constellations (GPS, GLONASS, Galileo, BeiDou, QZSS, NavIC) across L1, L2, L5, and L6 bands, with 672 dedicated channels. The unit is designed to provide FIX in under 5 seconds, maintaining the solution even in the presence of multipath, vegetation, or complex urban scenarios.

The next-generation IMU-based tilt compensation allows for measuring points with an inclined pole without loss of operational accuracy, reducing setup time and facilitating surveys in difficult-to-reach points. The magnesium alloy body with IP68 protection ensures robustness, resistance to impacts, water, and dust, making the RS4 suitable for construction sites, agricultural environments, and extreme weather conditions.

Usage and Applications

Reach RS4 is ideal as an RTK rover connected via NTRIP or as a base/rover pair via integrated UHF/LoRa radio, thus covering both mobile surveys and local reference stations. It is used in topographic surveys, construction site stakeout, high-accuracy GIS surveys, precision agriculture, and infrastructure projects where reliable and repeatable data are needed.

Integration with Emlid Flow and major GIS and construction apps enables smooth workflows for managing points, lines, and surfaces, as well as export to industry-standard formats. The combination of multiple connectivity options, extended battery life, and advanced TILT makes the RS4 particularly suitable for survey teams requiring high productivity with rapid configurations.

Key Technical Specifications

GNSS and Performance

• Frequencies: Multi-frequency GNSS L1, L2, L5, L6.
• Tracked constellations:

1. GPS: L1C/A, L2C, L5.
2. GLONASS: L1OF, L2OF.
3. Galileo: E1‑B/C, E5a, E6.
4. BeiDou: B1I, B1C, B2a, B3I.
5. QZSS: L1C/A, L1C, L2C, L5.
6. NavIC: L1‑SPS, L5‑SPS.

• Number of channels: 672.
• FIX time: typically < 5 s in RTK mode.
• Update rate: up to 10 Hz.

TILT and Sensors

• Tilt compensation: Based on next-generation integrated IMU, optimized for quick initialization and intuitive use.
• Operation with inclined pole, allowing surveying of difficult-to-access points while maintaining RTK precision.

Mechanics and Robustness

• Dimensions: 128.6 × 128.6 × 99.3 mm.
• Weight: approx. 920 g.
• Body: Magnesium alloy with replaceable protective bumpers.
• Protection rating: IP68 (resistant to dust and water immersion).
• Operating temperatures: From approx. −40 to +65 °C, suitable for extreme climates.
• Quick-release mount: Quick-release pole attachment with standard 5/8″ thread, designed for secure fastening even with an inclined pole.

Power and Battery Life

• Battery life: Up to 16 hours of continuous operation as an RTK rover with active TILT.
• High-capacity internal battery (approx. 7000 mAh) with USB Type‑C charging.
• USB‑C charging support with compatible power adapters and power banks.

Data Connectivity

• LoRa Radio:

1. Power: Up to 1 W.
2. Band: 868/915 MHz (compatible with included 860–930 MHz antenna).
3. Range: Up to approx. 8 km in optimal conditions.

• UHF Radio:

1. Power: Up to 2 W.
2. Band: 410–470 MHz (compatible with included antenna).
3. Supports professional protocols such as TRIMTALK 450S for use with dedicated radio bases.

• RTK Corrections: NTRIP support with RTCM3 formats.
• Position Output: NMEA, LLH/XYZ, with logging in RINEX, NMEA, LLH/XYZ, UBX to internal memory.
• Internal Memory: 16 GB for recording static and kinematic sessions.
• Interfaces:

1. Bluetooth (version 4.2 or higher, depending on product revisions).
2. Dual-band Wi‑Fi for connection to local networks or hotspots.
3. USB Type‑C for power and data transfer.

Emlid Reach RS4 Technical Specifications Table

Package contents

The Emlid Reach RS4 kit comes complete with everything needed to start working in the field with quick and secure setup. The included accessories are selected to utilize both the integrated LoRa and UHF radios, as well as ensure easy transport and charging.

The package includes

• Emlid Reach RS4 GNSS receiver.
• Carrying case, designed to protect the receiver and accessories during travel.
• USB Type-C cable for charging and data connection.
• LoRa 860–930 MHz antenna for use with the integrated LoRa radio.
• UHF 410–470 MHz antenna for the integrated UHF radio.

This configuration allows the Reach RS4 to be used as both an NTRIP rover and as part of a radio base/rover solution, integrating it easily into existing topographic and GIS workflows.

NRTK Correction Service Included (Optional)

With the optional TruePoint CM (1 YEAR) you get maximum centimeter accuracy guaranteed across all constellations (Full GNSS). An unlimited NRTK correction service for 12 months, ideal for immediate and uninterrupted work with maximum reliability.