Teltonika FMB125
Teltonika FMB125 — 2G GPS tracker with dual SIM, RS232/RS485, 1-Wire temperature monitoring and Bluetooth. Official Teltonika UK distributor.
Teltonika FMB125 — Professional Dual SIM GPS Tracker with RS232/RS485
The Teltonika FMB125 is a professional-grade GPS tracker built for demanding fleet applications that go beyond basic vehicle tracking. With dual SIM support, RS232 and RS485 serial interfaces, Bluetooth 4.0 and a 1-Wire temperature monitoring interface, it's the go-to choice for heavy duty transport operators, refrigerated fleet managers and international logistics businesses across the UK.
As an official Teltonika distributor in the UK, Tracking Hardware UK ships the FMB125 directly from our London warehouse — with volume pricing available for telematics service providers and fleet operators.
Key Features
Dual SIM — automatic failover between two SIM cards, significantly reducing roaming costs for international fleets.
RS232 and RS485 interfaces — connect digital fuel level sensors, Garmin navigation, RFID readers, barcode scanners and more.
1-Wire interface — ideal for refrigerated transport, enabling direct temperature and humidity monitoring.
External GNSS antenna — extends mounting options in vehicles where internal antenna placement is difficult.
Bluetooth 4.0 — connects to BLE sensors and supports wireless OBD2 diagnostics.
Backup battery — 170mAh Li-ion keeps tracking active if vehicle power is cut.
CAN bus compatible — works with Teltonika CAN adapters for deep vehicle data from agriculture, construction and mining equipment.
Jamming detection — alerts when GPS signal interference is detected.
128MB internal memory — stores up to 422,400 records when out of GSM coverage.
Overvoltage protection — safe for use across a wide range of vehicle electrical systems.
Typical Use Cases
Ideal for heavy duty transport, refrigerated vehicles requiring cold chain temperature compliance, international logistics with cross-border roaming, fuel management with LLS sensors, agriculture and construction machinery, and driver identification with iButton or RFID.
RS232 and RS485 for Specialist Integrations
What sets the FMB125 apart from the FMB120 is its RS232 and RS485 serial ports. These let you connect specialist peripherals that standard trackers cannot handle — fuel-level sensors for tank monitoring, CAN bus adapters such as the LV-CAN200 or ALL-CAN300 for vehicle data, and other serial devices used in HGV, agricultural and fuel-management projects. If your installation needs more than position and ignition data, the FMB125 is the model in the FMB1 series built for the job.
Driver Identification with the FMB125
Through its 1-Wire interface the FMB125 supports iButton and RFID driver identification readers, and its Bluetooth connectivity works with the Tracking Hardware UK BLE driver identification keypad. Combined with the digital output, you can configure the vehicle to remain immobilised until a recognised driver identifies — a popular setup for pool vehicles, plant hire and grey-fleet management across the UK.
Why Buy the FMB125 from Tracking Hardware UK
As an official Teltonika distributor we hold FMB125 stock in our London warehouse for next-working-day UK delivery. We offer bulk pricing for telematics service providers and installers, free UK-based technical support, and optional pre-configuration — APN, server settings and reporting profile loaded before dispatch so your devices arrive plug-and-play.