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Stonex S850A GNSS Receiver

The Stonex S850A has reached End of Life (EOL). Stonex has replaced the S850A with the S850ANew as an upgrade to the original receiver.



The Stonex S850A is a compact, high-performance GNSS receiver with 700 channels that supports GPS, GLONASS, BeiDou, Galileo, QZSS, IRNSS and L-Band corrections.

The advanced receiver design gives the S850A excellent signal tracking ability and interference resistant capacity. It’s lightweight, portable design make the S850A GNSS receiver an excellent choice for fieldwork in areas with complex terrain.

The Stonex S850A has integrated Bluetooth, internal Wi-Fi functionality, a built-in dual-frequency UHF radio (410-470 MHz and 902.4-928 MHz) and a 4G GSM modem that can be used anywhere in the world.

The Stonex S850A also has an integrated E-Bubble sensor that allows measurement of difficult points when the pole is not level.


  • Supports 700 channels and multiple constellations
  • Integrated dual-frequency UHF radio (410-470 MHz and 902.4-928 MHz
  • Light weight with rugged magnesium housing
  • Internal battery capable of over 9 hours operation
  • Equipped with standard Type-C connector
  • 4G LTE and Bluetooth
  • WLAN datalink support
  • Easy configuration from Web UI
  • Integrated E-Bubble sensor that allows measurement of difficult points when the pole is not level
  • Support PPP service with L-Band correction

Technical Specifications

Board: Hemisphere Phantom 40
Channels: 700
GPS: L1C/A, L1C, L1P, L2C, L2P, L5
Galileo: B1, B2, B3, ACEBOC
BeiDou: E1, E5a, E5b, ALTBOC, E6
QZSS: L1 C/A, L1C, L2C, L5, L6
SBAS: L1, L5
L-Band: Atlas Basic/H10/H30
Update Rate: 5Hz, 10 Hz (optional)
Operating System: Linux
Memory: 8 GB
Static Survey: 2.5 mm + 1 ppm RMS (Horizontal)
5.0 mm + 1 ppm RMS (Vertical)
RTK (< 30 Km): < 0.6 m (Horizontal)
< 1.0 m (Vertical)
Code Differential: 2.5 mm + 1 ppm RMS (Horizontal)
5.0 mm + 1 ppm RMS (Vertical)
SBAS Accuracy: < 0.6 m (Horizontal)
< 1.2 m (Vertical)
Internal UHF Radio
Model: TRM121
Type: Tx – Rx
Frequency Range: 410 – 470 MHz
902.4 – 928 MHz
Channel Spacing: 12.5 KHz / 25 KHz
Transmission Power: 1 watt
Maximum Range: 3-4 Km in urban environment
Up to 10 Km with optimal conditions
Size: 140 mm x 140 mm x 71 mm
Weight: 1.10 kg
Operating Temperature: -30 °C to +65 °C
Storage Temperature: -40 °C to +80 °C
Waterproof/Dustproof: IP67
Shock Resistance: Designed to endure a 2 m pole drop onto a concrete floor with no damage
Vibration: Vibration resistant
Power Supply
Battery: Rechargeable 7.2 V – 6.900 mAh
Voltage: 9 to 28 V DC external power input with over-voltage protection (5 pins Lemo)
Working Time: Up to 9 hours
Charge Time: Typically 4 hours


  • B10+150202 – S850A GNSS, 700Ch, 4G, WiFi, BT, E-Bubble – Bundle
  • 40-450183 – S850A UHF firmware activation
  • 40-450184 – S850A 20 Hz firmware activation


The S850A GNSS receiver from Stonex is available through TerrisGPS. If you would like more information about this product, please feel free to get in touch with us by completing the Request Pricing form.

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Client Testimonials

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"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
"Thanks for all the troubleshooting help, also to John for his assistance and the prompt answers from you guys!"
F.A. - Survey Industry

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