"The fuel level sensors "STRELA" with RS485 serial communication are designed to connect all types of devices that support the same interface (using data transfer protocols such as MODBUS or Omnicomm). Depending on the functional capabilities of your GPS tracker, you can connect 2 or more sensors of this interface. The sensors can be used in vehicle tanks, tractors, and other machines with a nominal onboard voltage of 12 or 24V. Required protocol parameters: up to 19200 bits per second, 8 bits, 1 stop bit. Resolution - up to 65535 points per length. You can customize the sensor and connect it to a PC or laptop to make necessary adjustments with the universal service adapter (USA 2.2)."