The Stonex SR35 External Radiomodem is a high-performance RTK radio designed to deliver reliable data transmission for professional GNSS surveying. With selectable transmission power ranging from 5W to 35W, the SR35 supports communication over distances up to 50km (31 miles), allowing you to maintain strong RTK correction signals even in remote areas.

Operating within a 410MHz to 470MHz frequency range and offering up to 200 programmable channels, the SR35 ensures seamless compatibility with Stonex GNSS receivers as well as third-party equipment. Its adaptable design allows it to function as a transceiver, transmitter, radio repeater, or network repeater, so you can customize its role to fit your project requirements.

Built for demanding environments, the IP67-rated housing protects against dust and water immersion, while the unit operates reliably in temperatures from -40°C to 75°C (-40°F to 167°F), so you can depend on the SR35 no matter the conditions. Integrated Bluetooth 4.0 allows for convenient wireless configuration, and the built-in 4G modem enhances connectivity, so you can streamline workflows and improve real-time data access.

The Stonex SR35 also supports fast configuration via PC software or an intuitive Android app, so you can efficiently manage settings and operations whether in the office or directly from the field.

Key Features

• Adjustable transmission power: 5W, 22W, or 35W
• Maximum transmission range of 50km (31 miles)
• Frequency range: 410MHz - 470MHz
• Up to 200 programmable channels
• Operating modes: transceiver, transmitter, radio repeater, network repeater
• Integrated Bluetooth 4.0 for wireless configuration
• Built-in 4G modem for enhanced connectivity
• IP67-rated for dust and water resistance
• Operating temperature: -40°C to 75°C (-40°F to 167°F)
• Compatible with Stonex and third-party GNSS receivers
• Configuration via PC software or Android app

What's Included

• LM.GK224.AAZ Cable with clamps to connect external battery and cable (30-350071)
• Cable 5pin Lemo/5pin Lemo/SAE for connecting GPS to external radiomodem or external battery (30-350072)
• LM.GK186.ABL Cable for connecting receiver and external radio (30-350096)
• TRB1 Holder for QC430/450A antenna on tripod (30-350095)
• SB-100 Soft bag for GNSS receiver and controller (30-350089)