UniStrong S3 Full-Featured IMU RTK Receiver

UniStrong

S3 Full-Featured IMU RTK Receiver

400 Hz
IMU Update Rate: IP67
Ingress Protection: 513 g
Weight

Original UniStrong unit·Authorized distributor

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Dispatch in 3 to 7 working daysShips in 3–7 days · DDP / CIF / FOB
DDP / CIF / FOB to most countries
Local coordinate system preset before shipping

Overview

About the S3

The S3 is a full-featured IMU RTK receiver equipped with a high-performance, high-precision GNSS OEM board. It provides full-constellation and full-frequency signal tracking with comprehensive support for the BeiDou navigation satellite system. Supporting narrowband anti-interference technology and automatic ionospheric optimization, it meets surveying requirements in complex environments. Pre-installed with Stonex fourth-generation IMU tilt compensation technology, it enables immediate measurement on the go and walk-and-stakeout operations. The overall exterior design and weight have been significantly optimized compared to previous generations, markedly improving field engineering stakeout efficiency.

Specifications

The S3 is a full-featured IMU RTK receiver equipped with a high-performance, high-precision GNSS OEM board. It tracks all-constellation, all-frequency signals and provides full support for the BeiDou navigation satellite system. Featuring narrowband anti-interference technology and automated ionospheric mitigation, it meets surveying requirements in challenging environments. Pre-loaded with Stonex's 4th-generation IMU tilt compensation technology, it enables immediate measurement right on the pole for seamless walk-and-stakeout operation. The industrial design and overall weight have been significantly optimized compared to previous generations, greatly enhancing field stakeout efficiency.

All-Constellation All-Frequency · Rapid Signal Locking

Equipped with a high-performance, high-precision GNSS OEM board, it ensures reliable signal reception quality while supporting all-constellation, all-frequency GNSS signals including BeiDou, GPS, GLONASS, Galileo, and QZSS, enabling rapid acquisition, tracking, and processing of GNSS satellite signals.

Powerful Performance · Compact and Portable

As a comprehensive IMU RTK receiver, the S3 combines powerful performance with a compact form factor. Measuring 120 mm × 71.5 mm and weighing only 513 g, it offers lightweight convenience for field operations.

Seamless IMU · Effortless Tilt Measurement

Powered by Stonex's 4th-generation IMU tilt compensation technology, it is immune to magnetic interference and eliminates the need for bubble leveling—measure on the go and perform stakeout while walking, ensuring reliable surveying accuracy and boosting field efficiency by 50%.

Hardcore Technology · Efficient Network Signals

- Features narrowband anti-interference technology with automated ionospheric mitigation, actively detecting and suppressing internal and external interference to meet surveying demands in complex environments with high-efficiency fixed solutions. One-Touch Fix - One-touch configuration for nationwide CORS differential services delivers quick RTK fixed solutions right after power-on, supporting direct measurements in coordinate systems such as CGCS2000. Battery Life - Built-in dual smart lithium batteries deliver up to 16 hours of continuous daily operation. The Type-C interface supports PD fast charging, significantly reducing charge times; it can also be powered by a power bank in emergencies for worry-free battery life. Dual Data Backup - Survey data supports dual-backup between the data controller and receiver, providing dual assurance for data integrity. 3-Year Free eSIM Data - Built-in eSIM allows measurement right after power-on with 3 years of free cellular data, enabling network RTK operations without inserting a physical SIM card. Ingress Protection - IP67 industrial-grade protection shields against dust ingress and protects internal components; it provides comprehensive protection even during prolonged water immersion.

Specifications

Technical data

Values from the UniStrong datasheet. Ask us for the full sheet or a side by side with another model.

GNSS Performance

Tracking Characteristics: BDS: B1I, B2I, B3I, B1C, B2a, B2b, BDSBAS-B1C, BDSBAS-B2a
Tracking Characteristics: GPS: L1C/A, L2P(Y), L2C, L5
Tracking Characteristics: GLONASS: L1, L2
Tracking Characteristics: Galileo: E1, E5a, E5b, E6
Tracking Characteristics: QZSS: L1, L2, L5, L6
Tracking Characteristics: Supports SBAS, including WAAS/GAGAN/MSAS/EGNOS/SDCM/BDSBAS
RTK Bridging: Supported

Accuracy Specifications

Static Surveying: Horizontal: ±(2.5+0.5×10⁻⁶D) mm, Vertical: ±(5+0.5×10⁻⁶D) mm
RTK Surveying: Horizontal: ±(8+1×10⁻⁶D) mm, Vertical: ±(15+1×10⁻⁶D) mm

IMU Tilt Compensation

Compensation Accuracy: 8 mm + 0.3 mm/° tilt (accuracy < 2 cm within 30°)
Tilt Angle: 0° - 70°
IMU Update Rate: 400 Hz

System Platform

Operating System: Industrial-grade Linux operating system
Internal Storage: 16 GB on-board
Bluetooth: Bluetooth 5.0, backward compatible with BLE (Bluetooth Low Energy)
Wi-Fi: IEEE 802.11a/b/g/n/ac

Universal UHF Radio

Communication Protocols: Supports full protocols: TrimTalk 450s, TrimTalk (4800), TrimMarkIII, SOUTH (9600/19200), PCC-GMSK, PCC-4FSK, PCCFST, PCCFST_ADL, PCC-EOT, Hi-Target (9600/19200), Geotalk, GeoMark, Satel, Satel_ADL, HZSZ, etc., interoperable with major global brand radios
Frequency: 410 - 470 MHz, freely switchable
Channels: 7 + 2400 (7 fixed channels + 2400 custom channels)

Data Interfaces

TNC Connector: Connects to internal UHF radio antenna
Type-C: For direct charging and data transmission

Environmental Specifications

Operating Temperature: -30°C to +60°C
Storage Temperature: -40°C to +80°C
Ingress Protection: IP67
Drop Resistance: Withstands 2 m pole drop onto hardwood floor at room temperature, 1.2 m free drop
Humidity: Resistant to 99.9% condensation