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Stonex S900Ai GNSS Receiver

Stonex S900Ai GNSS Receiver

The S900Ai GNSS receiver from Stonex is equipped with a high performance GNSS board 555 channels and capable of supporting multiple satellite constellations, including L-Band correction.



Powerful Precision

Stonex S900Ai is equipped with an high performance GNSS board 555 channels and capable of supporting multiple satellite constellations: GPS, GLONASS, BeiDou, Galileo and L-Band corrections.

Through the 4G GSM modem a fast internet connection is guaranteed for the reception of correction data and the management of the maps in the background.

In the amazingly compact structure the Bluetooth and Wi-Fi modules allow always reliable data flow to the controller, and the integrated TX/RX UHF radiomodem with selectable frequencies, make S900Ai the perfect system for a GNSS Base + Rover.

Stonex S900Ai integrates E-Bubble sensor that allows the measurement of difficult points with the pole not levelled. It is possible to measure points with an inclination of the pole up to 30° even in harsh environments and in the presence of magnetic fields.

Thanks to measurement routine integrated into the field software, the management of tilt function is simple and intuitive.


  • 555 channels to track GPS, GLONASS, BeiDou and Galileo
  • L-Band capable with TerraStar subscription
  • E-Bubble sensor allows for accurate measurements even when pole is not level
  • Web UI to monitor and change settings
  • 2 hot swappable batteries that provide up to 12 hours of operation on a single charge
  • IP67 rating for water and dust
  • Designed to withstand 2 m pole drop onto a concrete floor with no damage

Technical Specifications

GPS:L1 C/A, L1C, L2C, L2P, L5
GLONASS:L1 C/A, L2C, L2P, L3, L5
BeiDou:B1, B2, B3
Galileo:E1, E5a, E5b, E5 AltBOC, E6
QZSS:L1 C/A, L1C, L2C, L5, L6
L-Band:TerraStar (with subscription)
Position Rate:5 Hz, optional 20 Hz
Signal Reacquisition:< 1 sec
RTK Signal Initialization:Typically < 10 s
Hot Start:Typically < 15 s
Initialization Reliability:> 99.9 %
Micro SD Card:Expansion slot up to 32 GB
Battery:2 rechargeable and replaceable intelligent lithium batteries
7.2 V – 3400 mAh
Voltage:9 to 22 V DC external power input with over-voltage protection (5 pins Lemo)
Working Time:Up to 12 hours
Charge Time:Typically 4 hours
Dimensions:157 mm x 76 mm
Weight:1.19 kg (one battery)
1.30 kg (two batteries)
Operating Temperature:-30 °C to 65 °C
Storage Temperature:-40 °C to 80 °C
Shock Resistance:Designed to endure to a 2m drop pole on concrete floor with no damage
Vibration:Vibration resistant


The S900Ai GNSS receiver from Stonex is available through TerrisGPS. If you would like more information regarding this product, feel free to get in touch with us by completing the Request Pricing form.

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Client Testimonials

"Thanks for all the troubleshooting help, also to John for his assistance and the prompt answers from you guys!"

F.A. - Survey Industry

"Thank you for your prompt service. All seems to be working well again. Your techs were very helpful with the troubleshooting."

J.O. - Ground Navigation

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