Emlid RS4 Base and Rover Survey System

A cost-effective and highly accurate GNSS base and rover setup featuring two Emlid Reach RS4 receivers. The Reach RS4 is the flagship all-band RTK GNSS receiver, designed to make fieldwork faster, more flexible, and more reliable with no compromises.

Reach RS4 Features

Improved Tilt Compensation Algorithm
Experience 5x faster tilt compensation. The next-generation IMU activates in just 5 to 7 seconds, requiring only a few moves to initialise.

Quick-Release Mount
Features a 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, and L6 across 672 channels, providing greater multipath resistance and the ability to work even under a canopy.

Fully Functional Dual Band Radio System
The UHF bands can now be used to send corrections. UHF radios support transmission power up to 2 W (depending on local country regulations), while the LoRa radio supports up to 1 W, optimised to remain within licence-free limits in most regions.

Even More Durable
Constructed from a premium magnesium alloy commonly used in aerospace and medical equipment. It features an IP68 rating and an expanded operating temperature range of -40 to +65°C.

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 range 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
 

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 × 2
Bipod × 1
Extension Pole (30cm) × 1
EMLID Survey Pole with Smartphone Mount × 1
Tribrach with Optical Plummet × 1
Rotating Tribrach Adapter × 1
Aluminium Tripod × 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