Emlid Reach RS4
W-9 and vendor pack with every quote
Shipped direct from the manufacturer
Reach RS4 All-Band GNSS Receiver
Overview
The Reach RS4 is a professional-grade GNSS receiver designed for high-precision surveying and mapping applications. With multi-band support, tilt compensation, and robust connectivity options, it delivers centimeter-level accuracy in the most challenging environments.
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.
Comprehensive GNSS Support
With support for all major GNSS constellations including GPS, GLONASS, Galileo, BeiDou, QZSS, and NavIC, the RS4 delivers superior satellite tracking and faster initialization times compared to conventional receivers.
The device is future-proofed to work with upcoming correction services like SSR corrections and Galileo HAS, ensuring long-term viability for your surveying needs.
Next-gen tilt compensation
The Reach RS4 delivers accurate results even at high tilt angles — for example, a 30° 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.
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.
Key Advantages
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 ºС
The Reach RS4 operates in temperatures from -40°C to +65°C. Its performance remains excellent in both freezing cold and scorching heat.
What's in the Box
The Reach RS4 comes complete with everything you need to start surveying right out of the box:
Use Cases
Precision Surveying
The Reach RS4 delivers the accuracy required for professional surveying applications with static precision of H: 4 mm + 0.5 ppm and V: 8 mm + 1 ppm.
Construction Layout
With tilt compensation and fast initialization, the RS4 is ideal for construction layout tasks where time is critical.
Precision Agriculture
The RS4's support for multiple correction sources makes it suitable for precision agriculture applications.
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, offsets, and curves with precision
- Cut & Fill calculations – measure earthworks and stockpiles on site
- As-built verification – check constructed structures against your plans
Technical Specifications
| Precision Static | H: 4 mm + 0.5 ppm V: 8 mm + 1 ppm |
| Precision PPK | H: 5 mm + 0.5 ppm V: 10 mm + 1 ppm |
| Precision RTK | H: 7 mm + 1 ppm V: 14 mm + 1 ppm |
| Tilt Compensation | RTK + 2 mm + 0.3 mm/° |
| Convergence Time | <5 s typically |
| Number of Channels | 672 |
| Update Rates | Up to 10 Hz |
| Emlid Radio | Included |
| LoRa Radio | 868/915 MHz, 0.1W, Up to 8 km |
| UHF Radio | 410-470 MHz, TRIMTALK 450S |
| LTE Modem | Global bands, Nano-SIM |
| Wi-Fi | 802.11a/b/g/n |
| Bluetooth | Bluetooth 5.1 (BR/EDR + LE) |
| Ports | RS-232, USB Type-C |
| Dimensions | 128.6 × 128.6 × 99.3 mm |
| Weight | 920 g |
| Operating Temperatures | -40 to +65 °C |
| Ingress Protection | IP68 |
| Autonomy | 16 hrs as RTK rover with tilt 22 hrs of logging |
| Battery | Li-Ion 5000 mAh, 7.2 V, 36 Wh |
| Charging | USB Type-C (PD): 5V/3A, 9V/3A, 12V/3A, 15V/3A |
| Internal Storage | 16 GB |
| GPS | L1C/A, L2C, L5 |
| GLONASS | L1OF, L2OF |
| Galileo | E1B/C, E5a, E6 |
| BeiDou | B1I, B1C, B2a, B3I |
| QZSS | L1C/A, L1C/B11, L2C, L5 |
| NavIC | L1SPS Data, L5SPS |
| Corrections | NTRIP, RTCM3 |
| Position Output | NMEA, LLH/XYZ |
| Data Logging | RINEX, NMEA, LLH/XYZ, UBX |