Product Introduction
The S9 series RTK products are a hallmark of Sitoli. The S9II, Sitoli's second-generation RTK, builds on this legacy while breaking new ground with comprehensive upgrades. Featuring a genuine full magnesium alloy body, a unique combined antenna design, a dual-battery configuration with hot-swap capability, and fourth-generation inertial navigation tilt measurement technology, it delivers precise measurements without the need for calibration. 4G network compatibility ensures lightning-fast performance for intelligent operation.
These features make the S91 smarter, more innovative, and more professional, forging exceptional quality.
The S9II is equipped with a world-leading board-level engine that delivers powerful processing capabilities. With 336 channels, it not only supports all satellite constellations but also fully supports all systems-including global satellite navigation systems, regional satellite navigation systems, wide-area augmentation systems, and satellite-based augmentation systems. Users can apply to enable the RTX function to meet the centimeter-level accuracy requirements for single-unit surveying operations. Multi-threading: The receiver can simultaneously record static data across 8 threads, with each thread allowing independent configuration of station name, sampling interval, recording duration, and data format.
The S9II features a built-in high-sensitivity electronic bubble and employs a unique multi-point tilt measurement algorithm, enabling the acquisition of precise data without the need for calibration during surveys, thereby further improving operational efficiency.
Product Parameter (specification)
| GNSS Performance | |
| Tracking (BDS) | B1I / B2I / B3I / B1C / B2a / B2b* |
| Tracking (GPS) | L1C/A / L2P (Y) / L2C / L5 |
| Tracking (GLONASS) | L1 / L2 |
| Tracking (Galileo) | E1 / E5a / E5b / E6* |
| Tracking (QZSS) | L1 / L2 / L5 / L6* |
| Static accuracy (horizontal) | ±(2.5 mm + 0.5 ppm) RMS |
| Static accuracy (vertical) | ±(5 mm + 0.5 ppm) RMS |
| RTK accuracy (horizontal) | ±(8 mm + 1 ppm) RMS |
| RTK accuracy (vertical) | ±(15 mm + 1 ppm) RMS |
| INS / IMU Measurement | |
| Compensation accuracy | 8 mm + 0.3 mm/° tilt (< 2 cm within 30°) |
| Compensation angle range | 0° ~ 70° |
| IMU update rate | 400 Hz |
| System Platform | |
| Operating system | Linux |
| Internal storage | 8 GB onboard |
| Bluetooth | V2.1+EDR / V4.1 dual mode, Class 2 |
| WiFi | 802.11 b/g/n |
| Cellular | 4G All network compatible (China Mobile, Telecom, Unicom) |
| Electronic bubble | Supported |
| Global Radio | |
| Communication protocols | TrimTalk, TrimMaskIII, SOUTH, PCCEOT, Geotalk, Hitarget |
| Frequency | 410 – 470 MHz |
| Channels | 7 + 2400 (7 fixed, 2400 user-definable) |
| External radio power | Adjustable: 5 W / 35 W |
| Data Interfaces | |
| TNC connector | For internal radio antenna |
| 5pin connector | For external power and external radio |
| 7pin connector | For data transfer |
| SIM card slot | For SIM card |
| User Interface | |
| Button | Power button: press to turn on/off; short press to announce current working mode and status |
| Electrical Specifications | |
| Battery | Removable smart Li-ion battery, 3400 mAh × 2, 7.2 V, hot-swappable |
| Input voltage | 9 – 28 V DC |
| Physical Characteristics | |
| Dimensions | 156 mm × 76 mm |
| Weight | 1100 g |
| Environmental Specifications | |
| Operating temperature | –30 °C ~ +70 °C |
| Storage temperature | –40 °C ~ +80 °C |
| Ingress protection | IP67 |
| Drop resistance | 2 m drop with pole onto concrete |
| Humidity | 99.9% condensing |
| Handheld Controller Parameters | |
| Model | P9IV |
| Processor | High-performance octa-core 2.0 GHz |
| Operating system | Android 11 |
| Display | 5.0-inch high-definition touch screen |
| Camera | 13 MP autofocus with flash |
| RAM | 3 GB LPDDR4X |
| Storage | 32 GB onboard, supports TF card up to 512 GB |
| Sensors | Electronic compass, electronic bubble, gravity sensor (standard) |
| Cellular | 4G All network compatible (China Mobile, Telecom, Unicom) |
| WiFi | 2.4 GHz / 5 GHz, 802.11 ac/a/b/g/n |
| Bluetooth | BT2.1+EDR / 3.0 / 4.1 / 4.2 / 5.0 BLE |
| Builtin battery | 6400 mAh non-removable Li-ion, 3.85 V, 20-hour endurance |
| Ingress protection (handheld) | IP67 |
| Drop resistance (handheld) | 1.2 m onto concrete |
| Operating temperature (handheld) | –30 °C ~ +65 °C |
| Storage temperature (handheld) | –40 °C ~ +80 °C |
Product Feature And Application
World-class graphics cards, delivering powerful rendering performance
The board is considered the "engine" of RTK. The S9II is equipped with a world-leading board engine that delivers powerful positioning performance. With 336 channels, it not only supports all satellite constellations but also fully supports all systems-global satellite navigation systems, regional satellite navigation systems, wide-area augmentation systems, and satellite-based augmentation systems. Users can apply to enable the RTX feature to meet the centimeter-level accuracy requirements for single-unit surveying operations. Multi-threading: The receiver can simultaneously record static data across 8 threads, with each thread allowing independent configuration of station name, sampling interval, recording duration, and data format.

Fourth-generation inertial navigation-based tilt measurement: immune to electromagnetic interference, no need for bubble alignment-simply raise the pole and start measuring, with on-the-go staking.
·Surveying in areas with ditches and streams? No problem-measure with ease.
·Surveying in densely built-up areas? Corner points? Measure with ease.
·Surveying in urban areas? No need to go around-measure with ease.
·Topographic mapping, No need to watch the bubble-measure with ease.

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Shandong Surveying Information Technology Co., Ltd. is a professional manufacturer and one-stop supplier of surveying and mapping instruments, with nearly 20 years of industry experience. We specialize in the production of RTK receivers, automatic levels, total stations and theodolites, and also act as an authorized agent for multiple well-known industry brands, covering a full range of engineering surveying tools, measuring instruments and experimental equipment. We integrate production, global trade, technical support and after-sales service, committed to providing global customers with high-quality products and professional solutions. We look forward to cooperating with you!



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