Reach RS4 Pro
All-band RTK GNSS receiver
with tilt compensation and dual cameras
with tilt compensation and dual cameras
Visual stakeout
and remote point capture
for faster and safer work.
$8399
Stake out faster with AR
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. With larger projects - this time saving can be significant.
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
Dynamic navigation | Auto bullseye View | Cut & fill indicator | Quick point switch
Measure from images
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.
Across water / Behind fences / Over traffic / Above pits / Around machinery
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Next-gen tilt compensation
The compensation mechanism activates with just a few moves and remains stable throughout the survey, saving time and avoiding the need for recalibration. Base and rover connectivity
NTRIP
Connect to VRS or single-base CORS networks using RTCM3 format for precise RTK corrections. 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
– Compatible with Reach & 3rd-party receivers with TRIMTALK 450S
LoRa 915 MHz
– Transmit and receive
– Up to 1W
– Compatible with Reach receivers
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.
Built to perform in extreme conditions
Magnesium alloy body
16 hours on one charge
Waterproof
-40 to +65 ºС
Software for every stage of your project
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
Unified workflows for all team members, consistent interface, no extra training needed
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
In the package
- Reach RS4 Pro
- Emlid LoRa antenna 860-930 MHz
- Emlid UHF Antenna 410-470 MHz
- USB Type-C cable
- Carrying case with a strap
Specification
Mechanical
Dimensions
128.6 x 128.6 x 99.3 mm Weight
920g Operating temperature
-40 to + 65 ºC Ingress protection
IP68 Electrical
Autonomy
16 hrs as RTK rover with tilt Battery
Li-Ion 5000 mAh, 7.2 V 36 Wh Charging
USB Type-C 5 V, 3 A
9V—3A, 12V—3A, 15V—3A Positioning
Static
H: 4 mm + 0.5 ppm
V: 8 mm + 1 ppm PPK
H: 5 mm + 0.5 ppm
V: 10 mm + 1 ppm RTK
H: 7mm + 1 ppm
V: 14mm + 1 ppm Tilt
RTK + 2 mm + 0.3 mm/° Convergence time
~5s typically Connectivity
Radio
LoRa radio up to 1W
▪ Frequency range 868/915 MHz
▪ Power 1W
▪ Distance up to 8km
UHF radio up to 2W
▪ Frequency range 410–470 MHz
▪ Protocols TRIMTALK 450S*
▪ Modulation type GMSK
*TRIMTALK is a trademark of Trimble Inc. LTE modem
Regions Global
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
SIM card Nano-SIM Wi-Fi
802.11a/b/g/n Bluetooth
5.1 (BR/EDR + LE) Ports
RS-232, USB Type-C Data
Corrections
NTRIP, RTCM3 Position output
NMEA, LLH/XYZ Data logging
RINEX, NMEA, LLH/XYZ, UBX Internal storage
16GB GNSS
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 Update rates
up to 10Hz Number of channels
672 Imaging
Image sensors
1/2.6 in, CMOS,
global shutter, Full HD Field of view
Front Camera H: 64.6°, V: 42.8°
Bottom Camera H: 63°, V: 42° Let's connect and discuss your needs
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.
Across water / Behind fences / Over traffic / Above pits / Around machinery
</div>
Next-gen tilt compensation
The Reach RS4 Pro 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.
The compensation mechanism activates with just a few moves and remains stable throughout the survey, saving time and avoiding the need for recalibration.
Base and rover connectivity
Build a powerful RTK GNSS setup with a single RS4 Pro using an NTRIP service such as AUSCORS or HxGN Smartnet, or pair with a second receiver for maximum flexibility. The Reach RS4 Pro can transmit and receive corrections using LoRa and UHF 450 MHz.
NTRIP
Connect to VRS or single-base CORS networks using RTCM3 format for precise RTK corrections. 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
– Compatible with Reach & 3rd-party receivers with TRIMTALK 450S
LoRa 915 MHz
– Transmit and receive
– Up to 1W
– Compatible with Reach receivers
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.
Built to perform in extreme conditions
Magnesium alloy body
The RS4 Pros’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 Pro 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 Pro 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 Pro operates in temperatures from -40°C to +65°C. Its performance remains excellent in both freezing cold and scorching heat.
Software for every stage of your project
The Reach RS4 Pro 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 Unified workflows for all team members, consistent interface, no extra training neededExecute 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 siteIn the package
- Reach RS4 Pro
- Emlid LoRa antenna 860-930 MHz
- Emlid UHF Antenna 410-470 MHz
- USB Type-C cable
- Carrying case with a strap
Specification
Reach RS4 Pro Datasheet 135 KB
Mechanical
Dimensions
128.6 x 128.6 x 99.3 mm
Weight
920g
Operating temperature
-40 to + 65 ºC
Ingress protection
IP68
Electrical
Autonomy
16 hrs as RTK rover with tilt
Battery
Li-Ion 5000 mAh, 7.2 V 36 Wh
Charging
USB Type-C 5 V, 3 A
9V—3A, 12V—3A, 15V—3A
9V—3A, 12V—3A, 15V—3A
Positioning
Static
H: 4 mm + 0.5 ppm
V: 8 mm + 1 ppm
V: 8 mm + 1 ppm
PPK
H: 5 mm + 0.5 ppm
V: 10 mm + 1 ppm
V: 10 mm + 1 ppm
RTK
H: 7mm + 1 ppm
V: 14mm + 1 ppm
V: 14mm + 1 ppm
Tilt
RTK + 2 mm + 0.3 mm/°
Convergence time
~5s typically
Connectivity
Radio
LoRa radio up to 1W
▪ Frequency range 868/915 MHz
▪ Power 1W
▪ Distance up to 8km
UHF radio up to 2W
▪ Frequency range 410–470 MHz
▪ Protocols TRIMTALK 450S*
▪ Modulation type GMSK
*TRIMTALK is a trademark of Trimble Inc.
▪ Frequency range 868/915 MHz
▪ Power 1W
▪ Distance up to 8km
UHF radio up to 2W
▪ Frequency range 410–470 MHz
▪ Protocols TRIMTALK 450S*
▪ Modulation type GMSK
*TRIMTALK is a trademark of Trimble Inc.
LTE modem
Regions Global
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
SIM card Nano-SIM
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
SIM card Nano-SIM
Wi-Fi
802.11a/b/g/n
Bluetooth
5.1 (BR/EDR + LE)
Ports
RS-232, USB Type-C
Data
Corrections
NTRIP, RTCM3
Position output
NMEA, LLH/XYZ
Data logging
RINEX, NMEA, LLH/XYZ, UBX
Internal storage
16GB
GNSS
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
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
Update rates
up to 10Hz
Number of channels
672
Imaging
Image sensors
1/2.6 in, CMOS,
global shutter, Full HD
global shutter, Full HD
Field of view
Front Camera H: 64.6°, V: 42.8°
Bottom Camera H: 63°, V: 42°
Bottom Camera H: 63°, V: 42°