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Topcon B125 GNSS Receiver Board

The Topcon B125 GNSS receiver board is a small, multi-constellation GNSS board offering full constellation tracking and enhanced web capabilities in an ultra-compact package. It comes with a 226-channel Vanguard Technology with Universal Tracking Channels.



The B125 GNSS receiver board from Topcon is an ultra-compact receiver board with future-proof GNSS tracking of GPS, GLONASS, Galileo and BeiDou signals. It has the ability to perform centimeter-level RTK positioning as well as being remotely accessed over Ethernet.

The B125 is capable of providing scalable positioning from sub-meter DGPS positioning to sub-centimeter RTK positioning. This receiver is an extremely flexible and easy to integrate into any precise positioning application. Its flexibility comes from its low power consumption, comprehensive communication interfaces and peripheral support design.


  • Ultra-compact receiver board with future-proof GNSS tracking
  • Low power consumption
  • 226-channel Vanguard Technology with Universal Tracking Channels
  • SD card interface support for quick and easy data collection
  • Serial, USB, CAN and Ethernet available through a single connector for data exchange

Technical Specifications

Channels 394
GPS: L1, L2, L1C, L2C, L5
BeiDou: B1, B2
Galileo: E1, E5a, E5b, AltBOC
Hot Start: < 10 sec
Warm Start: < 35 sec
Cold Start: < 60 sec
Reacquisition: < 1 sec
Size: 40 mm x 55 mm x 10 mm
Weight: 20 g
Operating Temperature: -40 °C to 85 °C
Storage Temperature: -40 °C to 95 °C
Humidity: 95%, non-condensing
Vibration Rating: 4g Sine Vibe (SAEJ1211)
7.7g Random Vibe (MIL-STD 810F)
Shock / Crash Safety: 40 g (IEC 68-2-27)
Input Voltage Range: +3.4 to +5.5 VDC
Power Consumption: 2.0 W typical


The B125 GNSS receiver board from Topcon 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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"Thank you for your prompt service. All seems to be working well again. Your techs were very helpful with the troubleshooting."
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