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Topcon R4T-BT

Make Topcon
Model R4T-BT
Type GNSS Radios

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Extend your Hiper SR's range

R4T-BT is an innovative external radio designed to offer superior RTK performance with GNSS receivers. This is a unique solution with integrated batteries and features. Bluetooth® communication. At the same time; it provides an external UHF option for the HiPer SR receiver product line.

Key Features include:


Extend your range

The R4T-BT combines a UHF radio, Bluetooth, and an internal battery all together in a rugged IP67 classified housing. If you need to extend the communication radio range between your RTK Base Station and Rover, the R4T-BT is a perfect fit.

Get more out of your existing equipment

If you already have a HiPer SR but find yourself on a bigger job site or without a clear line-of-sight, you’re now able to extend the range from up to 300 m to miles. Even if you have a third-party GNSS receiver, our open architecture lets you easily adapt the R4T-BT into your workflow and create a modular solution.

Stay connected

The R4T-BT is perfect in situations without a network connection, or where network or cellular connections are poor. Simply add on this external UHF radio and extend the range between the base and rover. Ready for the field With an IP67 certification, the R4T-BT is ready to tackle even the toughest jobs. The housing is water and dustproof for rough outdoor conditions.


  • Geopositioning 


  • Battery: 7200 mAh
  • Bluetooth: BT 4.1 wireless connectivity
  • Carrier Power: 0.1, 0.2, 0.5, 1 W / 50 ohm
  • Channel Spacing*: 12.5 / 25 kHz
  • Connector: M12 circular / TNC female
  • Data Speed of Radio Interface: 28800 bps (25 kHz)
  • Data Speed of RS Interface: 9600 – 115200 bps
  • Frequency: 403 – 473 MHz
  • Interface: RS-232 / USB
  • Operating Temperature: Operating: -20ºC to 60ºC Storage: -40ºC to 85ºC
  • Operating Voltage: 12 to 30 VDC
  • Operation Time: 6 hours at TX 1 W (50 %) 8 hours at TX 0.5 W (50 %) 20 hours at RX only
  • Power Consumption: Charging 7.4 W Charging + RX 8.4 W Charging + TX 13.2 W at 1 W RF Device off 0.46 W RX 1.32 W TX 5.8 W at 1 W RF
  • Size: 163 x 49 x 49 mm (h x w x d)
  • USB: USB to serial interface
  • Weight: 420 g


  • IP67 Rating
  • Light, weighing only 400 g
  • Transmit Mode: 6 hours at 1 W
  • Wireless modem configuration and data transfer via Bluetooth®
  • Receive Mode: 20 hours
  • Long operational time


Copy Set


  • Geopositioning 




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