Key Features

High-Precision GNSS Performance

Multi-band reception: GPS, GLONASS, Galileo, BeiDou, QZSS

Centimeter-level RTK accuracy for surveying and GIS mapping

Fast RTK fix times under challenging environments

Tilt Compensation

Survey at up to 60° tilt without losing accuracy

IMU-based correction ensures stable precision in the field

Ideal for measuring inaccessible or obstructed points

Connectivity & Communication

Integrated LoRa radio modem with 8 km line-of-sight range

NTRIP and TCP/IP support for base-rover configurations

Bluetooth, Wi-Fi, and USB-C connectivity

Field Durability & Power

IP68-rated rugged housing for dust, water, and shock resistance

Operates in harsh field conditions and extreme temperatures

Up to 22 hours of battery life; charges via USB-C or power bank

Software Integration

Fully compatible with Emlid Flow, Emlid Flow 360, and ReachView 3

Supports Android, iOS, and web-based access

Data export in industry-standard formats (CSV, DXF, ESRI SHP, RINEX)

In-The-Box

Reach RS4
Carrying case
USB Type-C cable
LoRa Antenna 860-930 MHz
UHF Antenna 410-470 MHz

Specs Sheet

Mechanical

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

Dimensions

128.6 x 128.6 x 99.3 mm

Weight

920 g

Operating temperatures

-40 to +65 °C

Ingress protection

IP68

Electrical

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

Autonomy

16 hrs as RTK rover with tilt

Battery

Li-Ion 5000 mAh, 7.2 V, 36 Wh

Charging

USB Type-C (PD): 5V—3A, 9V—3A, 12V—3A, 15V—3A

Positioning

Category	Specification
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
Tilt compensation	RTK + 2 mm + 0.3 mm/°
Convergence time	~5 s typically

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

Tilt compensation

RTK + 2 mm + 0.3 mm/°

Convergence time

~5 s typically

Connectivity

Category	Specification
LoRa radio up to 1W	Frequency range: 868/915 MHz Power: 0.1 W Distance: Up to 8 km
UHF radio up to 2W	Frequency range: 410–470 MHz Protocols: TRIMTALK 450S** Modulation type: GMSK
LTE modem Regions	Global
LTE modem 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
LTE modem SIM card	Nano-SIM
Wi-Fi	802.11a/b/g/n
Bluetooth	5.1 (BR/EDR + LE)
Ports	RS-232, USB Type-C

LoRa radio up to 1W

Frequency range: 868/915 MHz
Power: 0.1 W
Distance: Up to 8 km

UHF radio up to 2W

Frequency range: 410–470 MHz
Protocols: TRIMTALK 450S**
Modulation type: GMSK

LTE modem Regions

Global

LTE modem 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

LTE modem SIM card

Nano-SIM

Wi-Fi

802.11a/b/g/n

Bluetooth

5.1 (BR/EDR + LE)

Ports

RS-232, USB Type-C

Data

Category	Specification
Corrections	NTRIP, RTCM3
Position output	NMEA, LLH/XYZ
Data logging	RINEX, NMEA, LLH/XYZ, UBX
Internal storage	16 GB

Corrections

NTRIP, RTCM3

Position output

NMEA, LLH/XYZ

Data logging

RINEX, NMEA, LLH/XYZ, UBX

Internal storage

16 GB

GNSS

Category	Specification
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

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

Emlid Reach RS4