SphereFix SP35Se GNSS Receiver with AR Stakeout and IMU Tilt

The Spherefix SP35Se is a compact, multi-frequency GNSS RTK receiver designed for professional surveying and positioning work. It combines centimeter-level RTK positioning, tilt compensation, AR real-scene stakeout, multi-constellation satellite tracking and several wireless communication methods in a lightweight field-ready housing.

The SP35Se is designed for land surveyors, construction layout teams, civil engineers, GIS professionals, utility contractors, infrastructure inspectors, mapping teams and other users who need accurate outdoor coordinates or stakeout guidance.

The receiver can be used for topographic surveying, cadastral and boundary surveys, construction stakeout, road and infrastructure work, earthwork measurement, control-point collection, utility mapping, GIS data capture and as-built surveys.

Yes. The SP35Se can be configured for base-station or rover operation, depending on the selected correction workflow, radio settings and field software. This makes it suitable for both independent base-and-rover systems and network RTK operation.

Yes. Its centimeter-level RTK positioning, tilt compensation and AR real-scene stakeout function are designed to help construction teams locate design points, lines and site features more efficiently.

Yes. The receiver can collect accurate coordinates for utilities, roads, pipelines, environmental features, property assets and other GIS data. The achievable accuracy depends on satellite visibility, correction availability, field conditions and the selected survey method.

When operating with suitable RTK corrections and good satellite conditions, the SP35Se is designed to provide centimeter-level positioning. Published RTK specifications list horizontal accuracy of approximately ±(8 mm + 1 ppm) and vertical accuracy of approximately ±(15 mm + 1 ppm).

The SP35Se supports signals from GPS, GLONASS, BeiDou, Galileo, QZSS, SBAS and NavIC. Tracking multiple constellations can improve satellite availability and positioning reliability in challenging field environments.

The receiver uses 1,408 high-speed GNSS channels to track multiple frequencies and satellite constellations simultaneously.

Yes. The integrated tilt-measurement system allows survey points to be measured without keeping the pole perfectly vertical. The published specification states positioning accuracy of less than 2 cm within a tilt range of up to 60 degrees under suitable operating conditions.

The tilt system is designed to simplify field operation, but initialization or calibration requirements can depend on the firmware, survey software and working procedure. Users should follow the current Spherefix operating instructions before starting precision measurements.

AR real-scene stakeout uses the receiver camera and surveying software to display stakeout guidance over a live view of the site. This helps the operator understand the direction and distance to a target point without relying only on conventional arrows or numerical values.

The receiver supports commonly used GNSS data and correction formats, including NMEA-0183 output and RTCM 3.x correction data. Compatibility should be confirmed with the intended base station, CORS network, NTRIP service or field software.

The SP35Se includes full-network 4G cellular communication, Bluetooth, Wi-Fi, NFC and an integrated 0.5 W or 1.5 W UHF/LoRa data radio. These options support controller connections, internet-delivered corrections and local base-to-rover communication.

Yes. Its cellular and Wi-Fi connectivity can be used with compatible field software to receive internet-based RTK corrections from an NTRIP service or CORS network.

The integrated transceiver operates within the 410–470 MHz range and supports selectable transmission power. The frequency and radio configuration used must comply with local radio regulations.

Published specifications list support for several commonly used protocols, including TRIMTALK, TRIMMK3, SOUTH, TRANSEOT, SATEL and LoRa. Interoperability should be checked before combining the SP35Se with third-party radios or receivers.

Radio range depends on transmission power, antenna setup, terrain, interference, obstructions and local conditions. In open environments, the 1.5 W LoRa radio is designed for long-range base-to-rover communication, but actual field range can vary significantly.

Yes. The receiver can connect to a compatible Android field controller through Bluetooth, Wi-Fi or a network connection. Spherefix offers the C100T controller as an option, and compatibility with other controllers depends on their software and communication support.

The SP35Se may be used with compatible third-party field applications that support its communication interface, GNSS data formats and correction workflow. Software compatibility and available functions should be verified before deployment.

The receiver has a 7.4 V, 6,500 mAh lithium battery. Published specifications state more than 16 hours of operation in a typical rover workflow using cellular communication. Battery life varies with radio transmission, network use, temperature and other settings.

The SP35Se supports USB Power Delivery charging at 12 V/2 A and USB DCP charging at 5 V/3 A. A compatible power adapter and cable should be used to maintain safe and efficient charging.

Yes. The SP35Se has an IP68 protection rating, providing resistance to dust and water under the test conditions defined by the rating. Ports and covers must be correctly closed to maintain environmental protection.

The receiver is designed for professional outdoor use and is specified to resist a 2-metre pole drop at room temperature. Its housing combines a magnesium-alloy shell with an ABS/PC top cover.

The published operating temperature range is -30°C to +65°C, while the storage temperature range is -40°C to +85°C. Battery performance and measurement conditions should still be considered when working in extreme temperatures.

The receiver measures approximately 134 mm in diameter and 86 mm in height. It weighs no more than approximately 750 g, making it suitable for pole-mounted and mobile field surveying.