Experience next-level stakeout with augmented reality and measuring from photos with the Emlid Reach RS4 Pro.
With two Full HD cameras, the Emlid RS4 Pro Takes Surveying and Stakeout Further
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Stake Out Faster with AR Guidance - With the RS4 Pro, stakeout becomes visual. Rather than simply following coordinates on a map, your designs are directly overlaid on the real world, clearly showing where to place stakes. Crews can work faster with AR guidance, even on complex construction sites and roadworks.
- Dynamic Navigation
- Auto Bullseye View
- Cut & Fill Indicator
- Quick Point Switch
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Measure From Images - Even if you can't put the pole there, you can still measure it with your RS4 Pro. Use the cameras to measure building facades, areas behind fences, across busy roads and any other inaccessible points. Save time setting up a total station and avoid hazardous areas.
Unmatched Precision, Even Under Canopy
The Reach RS4 Pro delivers centimeter-level accuracy, even in challenging environments like forests or urban canyons. With support for every GNSS constellation and signal frequency, including the L5 and L6 bands, resistant to multipath and interference, the Reach RS4 Pro locks onto 40+ satellites simultaneously using 672 channels.
- 7mm + 1 ppm in RTK
- 672 Channels
- GPS, GLONASS, Galileo, BeiDou, QZSS, NavIC
- Full-Band Support: L1 / L2 / L5 / L6
- Fix in Under 5 Seconds
Next-Generation Tilt Compensation
The advanced tilt compensation stays accurate even at steep angles. For example, at a 30° tilt, the Reach RS4 Pro still delivers 18 mm precision. Initialization takes just a few quick movements and remains stable throughout the job, no manual recalibration needed.
- Factory Calibrated
- Interference Proof
- Rapid Initialization
- Unlimited Tilt Angles
Quick Release Mount
The custom-designed quick release mount ensures the receiver is locked firmly to your survey pole, eliminating backlash. Even the smallest wobble can affect tilt-based measurements at steeper angles. This mount solves the issue with a fast and rock-solid connection for reliable data accuracy.
Base and Rover Connectivity
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NTRIP - Connect to VRS or single-base CORS networks using RTCM3 format for precise RTK corrections. You can also transmit corrections from your own base using Emlid NTRIP Caster.
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Dual-Band Radio
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UHF 450 MHz
- Transmit and receive
- Up to 2W (may require a license)
- Compatible with Reach and 3rd-party receivers with TRIMTALK 450S support
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LoRa 915 MHz
- Transmit and receive
- Up to 1W (license-free in North America)
- Compatible with Reach receivers
Engineered for the Harshest Environments
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Magnesium Alloy Body - Crafted from the same material used in aerospace and high-end tech, the Reach RS4 Pro magnesium body offers exceptional strength without the extra weight. It’s rugged enough for demanding job sites, and light enough for all-day use.
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16 Hours on One Charge - No need to stop mid-job to recharge. The Reach RS4 Pro runs up to 16 hours on a single charge. Power up via USB-C or plug in a power bank on the go, maximum uptime, minimum hassle.
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Waterproof - From rainstorms to dusty construction sites, the Reach RS4 Pro is fully ready. With an IP68 rating, it’s completely sealed against water and debris.
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-40 to +65 ºС - From cold to heat, the Reach RS4 Pro performs without compromise. Engineered to operate flawlessly between -40°C and +65°C, it’s ready for work anywhere.
Emlid Reach RS4 Pro | Visual Stakeout and Remote Point Capture for Faster and Safer Work
Applications
Topographic Surveys: Capture precise elevation and terrain data
Stakeout & Layout: Mark points, lines, and site boundaries
Line & Road Surveys: Stake centerlines and offsets with precision
Cut & Fill Calculations: Measure stockpiles and earthworks on-site
As-Builts: Confirm construction accuracy against design plans
In the Box
1 - Reach RS4 Pro
1 - Carrying Case
1 - USB Type-C Cable
1 - LoRa Antenna 860-930 MHz
1 - UHF Antenna 410-470 MHz
Specifications
Imaging
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Image sensors: 1/2.6 in, CMOS, global shutter, Full HD
- Field of view
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Front camera: H: 64.6°, V: 42.8°
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Bottom camera: H: 63°, V: 42°
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Video frame rate: 25 fps
Mechanical
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Dimensions: 128.6 x 128.6 x 99.3 mm
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Weight: 920 g (2.028 lb)
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Operating tº: -40 to +65 °C (-40 to 149 °F)
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Ingress protection: IP68
Electrical
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Autonomy: 16 hrs as RTK rover with tilt
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Battery: Li-Ion 5000 mAh, 7.2 V, 36 Wh
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Charging: USB Type-C (PD): 5V—3A, 9V—3A, 12V—3A, 15V—3A
Positioning
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Static: H: 4 mm + 0.5 ppm | V: 8 mm + 1 ppm
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PPK: H: 5 mm + 0.5 ppm | V: 10 mm + 1 ppm
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RTK: H: 7 mm + 1 ppm | V: 14 mm + 1 ppm
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Tilt compensation: RTK + 2 mm + 0.3 mm/°
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Convergence time: ~5 s typically
Data Protocols
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Corrections: NTRIP, RTCM3
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Position output: NMEA, LLH/XYZ
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Data logging: RINEX, NMEA, LLH/XYZ, UBX
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Internal storage: 16 GB
GNSS
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Signal tracked: GPS: L1C/A, L2C, L5, GLONASS: L1OF, L2OF, Galileo: E1-B/C, E5a, E6, BeiDou: B1I, B1C, B2a, B3I, QZSS: L1C/A, L1C/B11, L2C, L5, NavIC: L1-SPS Data, L5-SPS
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Number of channels: 672
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Update rates: up to 10 Hz
Connectivity
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LoRa radio: up to 1W
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Frequency range: 868/915 MHz
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Power: 0.1 W
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Distance: Up to 8 km
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UHF radio: up to 2W
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Frequency range: 410 - 470 MHz
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Protocols: TRIMTALK 450S**
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Modulation type: GMSK
- LTE modem
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Regions: Global
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Bands: FDD-LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 18, 19, 20, 26, 28 TD-LTE: 38, 39, 40, 41 UMTS (UHPS/FDD): 1, 2, 5, 8 Quad-band, 850/1900, 900/1800 MHz
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SIM card: Nano-SIM
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Wi-Fi: 802.11 b/g/n
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Bluetooth: Bluetooth 5.1 (BR/EDR + LE)
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Ports: RS-232, USB Type-C
*Use the correct antenna, LoRa or UHF, for your setup.
**TRIMTALK is a trademark of Trimble Inc.
