UniStrong

S9Ⅱ Professional RTK Receiver

400Hz
IMU Update Rate: 410~470MHz
Frequency: 1.2kg
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
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Overview

About the S9Ⅱ

The S9 series RTK is a legendary flagship line from STONEX. As a second-generation STONEX RTK receiver, the S9Ⅱ builds on this classic heritage with breakthrough innovations and a comprehensive upgrade. The S9Ⅱ features a genuine full magnesium-alloy body, a unique integrated combination antenna, dual hot-swappable batteries, and fourth-generation IMU tilt compensation technology for precise measurements without calibration. In addition, 4G full Netcom ensures high-speed connectivity for smart operation. These capabilities make the S9Ⅱ smarter, more innovative, and more professional, delivering truly outstanding quality.

S9II Professional RTK Fully Upgraded: Continuing a Classic

The S9 series RTK is a legendary achievement by STONEX. As a second-generation STONEX RTK device, the S9II continues the classic heritage while delivering breakthrough innovations and comprehensive upgrades. The S9II features a genuine all-magnesium alloy body, a unique integrated antenna design, hot-swappable dual batteries, and 4th-generation IMU tilt compensation technology for precise measurements without calibration. Full-band 4G provides high-speed connectivity for intelligent operation. These capabilities make the S9II smarter, more innovative, more professional, and built with outstanding quality.

The materials used in the S9II have been further upgraded. Both the inner and outer chassis are made of high-strength magnesium alloy, achieving a true all-magnesium alloy design that is lighter, sturdier, and more durable. Completely wireless internal interconnections between components ensure greater overall stability and reliability.

Regarded as the "engine" of an RTK, the S9II is equipped with a high-performance, high-precision GNSS OEM board to ensure superior satellite signal reception. It features full-constellation, full-frequency signal tracking with comprehensive support for the BeiDou navigation satellite system and rapid satellite signal acquisition. It also supports narrowband anti-interference technology to actively detect and suppress internal and external interference signals, meeting the demands of complex environments with efficient fixed solutions.

Built-In Integrated Antenna Eliminates Signal Dead Zones

The integrated antenna has become a standard feature on STONEX second-generation RTK products. Highly integrating the GNSS antenna, Bluetooth module, Wi-Fi module, and 4G module simplifies design, lowers maintenance, and reduces mutual crosstalk between components, significantly enhancing reliability. The 360° omnidirectional zenith signal communication further improves the quality and range of inter-device signal transmission.

Linux OS for a Smarter Experience

Powered by the Linux smart operating system and supporting the 2nd-generation WebUI, the S9II delivers a smarter user experience. With an embedded eSIM, it is ready to measure upon startup with one year of included cellular data, enabling network RTK operations without inserting a SIM card. The built-in full-band cellular module supports 2G/3G/4G networks, ensuring reliable data transmission and high-speed responsiveness for smart operations.

Specifications

Technical data

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

GNSS Performance

Signal Tracking: BDS: B1I, B2I, B3I, B1C, B2a, B2b, BDSBAS-B1C, BDSBAS-B2a
Signal Tracking: GPS: L1C/A, L2P(Y), L2C, L5
Signal Tracking: GLONASS: L1, L2
Signal Tracking: Galileo: E1, E5a, E5b, E6
Signal Tracking: QZSS: L1, L2, L5, L6
Signal Tracking: SBAS: WAAS, GAGAN, MSAS, EGNOS, SDCM, BDSBAS
Initialization Time: <10s

Performance Specifications

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

IMU Tilt Compensation

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

System Platform

Operating System: Linux
Internal Storage: 8 GB onboard, expandable up to 32 GB
Bluetooth: V5.0+EDR backward compatible / BLE
Wi-Fi: 802.11 b/g/n
Cellular Communication: 4G full Netcom (China Mobile, China Telecom, China Unicom)
Electronic Bubble: Supported
CPU: ARM Cortex A77
Data Format: Supports NMEA-0183

Internal UHF Radio

Communication Protocols: TrimTalk 450S, TrimTalk (4800), TrimMarkIII, SOUTH (9600/19200), PCC-GMSK, PCC-4FSK, PCCFST, PCCFST_ADL, Hi-Target (9600/19200), Geotalk, GeoMark, Satel, Satel_ADL, HZSZ; compatible with major global radio brands
Channels: 7+2400 (7 fixed channels, 2400 customizable channels)
Power: Integrated transceiver, 0.5W/1W (adjustable)
Frequency: 410~470MHz

User Interface

Button: Power button for powering on/off; short press broadcasts current operating mode and status

Data Interfaces

TNC Port: Connects to internal UHF radio antenna
5-pin Port: For external power supply and external UHF radio connection (RS232)
7-pin Port: For data transmission (RS232+USB)
SIM Card Slot: SIM card installation

Electrical Specifications

Battery: Removable smart lithium battery, 3400mAh × 2, 7.2V, supports hot-swapping
Input Voltage: 9~28V DC
Operating Time: Static mode ≥15h, rover mode ≥12h