Emlid Reach RS4 Pro

Features

The Reach RS4 Pro is Emlid's most advanced GNSS receiver, built on the RS4 platform and enhanced with dual Full HD cameras. Combining centimetre-level RTK accuracy with AR-guided stakeout and image-based measurement, the RS4 Pro enables faster, safer, and more versatile field operations. It is the perfect device for anyone looking for the latest technology.

Improved tilt compensation algorithm

5× faster tilt compensation — RS3 required 30–40 seconds to initialize; RS4’s next-gen IMU activates in just a few moves (5–7 seconds).

Quick-release mount

Backlash-free thread designed specifically for tilt workflows, ensuring accuracy even under pole tilt.

All-band support and new antenna

Tracks all bands, including L1/L2/L5/L6, 672 channels, providing greater multipath resistance and able to work even under a canopy!

Fully functional dual band radio system

…which means that the UHF bands can also be used to send corrections. This also comes with license support for radios. UHF radios support transmission power of up to 2 W, but the exact allowable power level depends on local country regulations and often requires a licence. The LoRa radio supports transmission power of up to 1 W, and the maximum output varies by country (detailed specs are coming soon). However, LoRa is optimised to remain within licence-free limits in most regions.

Even more durable

The RS4 is made from a new premium material: a magnesium alloy, which is often used in the manufacture of aerospace and medical equipment, as well as high-end electronics. It also features an IP68 rating and a wider operating temperature range of -40 to +65°C.

AR stakeout

Designs are overlaid directly onto the real-world view. First, you see the landscape, and as you get closer to the points, the view switches to the bottom camera with a bullseye.

Visual capture

You can record a video of a specific area and then obtain the coordinates of points directly from the pictures.

Drone mapping

The Reach RS4 can also be used as a base station for drones.

Product Specifications

Positioning

Precision
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: 7 mm + 1 ppm
V: 14 mm + 1 ppm
Convergence time ~5 s typically
Tilt compensation RTK + 2mm + 0.3 mm/°
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
Number of channels 672
Update rates Up to 10 Hz

Connectivity

LoRa radio
Frequency rangу 868/915 MHz
Power 0.1 W
Distance Up to 8 km
UHF radio 
Frequency range 410 - 470 MHz
Protocols TRIMTALK 450S**
Modulation type GMSK
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 Bluetooth 5.1 (BR/EDR + LE)
Ports RS-232, USB Type-C
Data protocols
Corrections NTRIP, RTCM3
Position output NMEA, LLH/XYZ
Data logging RINEX, NMEA, LLH/XYZ, UBX
Internal storage 16 GB

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°
Video frame rate 25 fps

Mechanical

Dimensions 128.6 x 128.6 x 99.3 mm
Weight 920 g
Operating temperatures -40 to +65 °C
Ingress protection IP68
 

Electrical

Autonomy 16 hrs as RTK rover with tilt, 22 hrs of logging
Battery Li-Ion 5000 mAh, 7.2 V, 36Wh
Charging USB Type-C (PD): 5V—3A, 9V—3A, 12V—3A, 15V—3A

In the box

Emlid Reach RS4 Pro × 1

WHY BUY FROM US?

By buying from Ferntech, you'll have the confidence that you are dealing directly with New Zealand's leading drone experts. Our staff are knowledgable drone pilots who offer expert advice, trusted support and superior specialist service. Only through us will you receive a full New Zealand warranty, phone and email support, and access to our certified Repairs Centre with DJI-qualified drone technicians. And we guarantee that we will have the best prices on the market — if not let us know and we will match any price (conditions apply).

Warranty Details