LIGO – AF probe length: (700mm-6000mm)

General description 

LIGO-AF Fuel level sensor is developed by SOJI Electronics. the device is designed to measure level of liquid fuel and other non-conductive liquids in vehicle and stationary tanks. The data output format of this model is Analogue or frequency

  • Measurement accuracy up to 99.5%.
  • Length  deduction up to 80 % of the initial length of the measuring probe.
  • Automatic recognization of new length after cutting feature (this feature can be enable or disable by software on PC).
  • Wide range working temperature from -40°C – +85°C.
  • Screen filter is mounted on the measuring probe tubes to protect measuring probe electrodes from mud and water.
  • IP67 waterproof.
  • Advanced filter algorithm and temperature compensation.
  • Configuration,update firmware through software on PC .
  • Easily to installing and sealling.
  • Digital self-diagnostics to control data reliability
  • IP67 waterproof.

    IP67 waterproof.

  • Anti vibration

    Anti vibration

  • Wide range working temperature from -40°C – +85°C.

  • Circuit protection mode


Parameter Value
DC input voltage, V 9-37
Standard length  (L),mm 700, 1000, 1500…up to 6000 mm
Power consumption(W)



At short circuit on analog output, maximum





Measuring period, s 1
Averaging time, s from 0…120
Measuring error, % ±0,5
Baud rate, bit/sec 2400, 4800, 9600, 19200, 38400, 57600, 115200
Analog output:
Max. output voltage, V 2…10
Min. output voltage, V 1…9
Frequency output:
Max. output frequency, Hz 1000…2000
Min. output frequency, Hz 500…1500
Input current, mA Max 50
Working temperature, °C -45 to 105
Ingress protection rating, IP IP67
DAC resolution, bit 12
Working principle (Capacitive Sensor)
Average service life, years 8




  • Trucks, containers, excavators, bulldozers, or trains …
  • Boats, barges.
  • Generator.
  • Oil tanks, industrial fuel tanks.
  • Factory, industrial zone.
  • The fuel tanks in the machine in agriculture, transport and marine …


         Datasheet AF Fuel Level Sensor 

           Brochure AF, RS232 Fuel Level Sensor V2.01

           User Guide AF, RS232 Fuel Level Sensor V1.02



           Setup Utility Program for Fuel Level Sensor V1.02 


  • Do not expose the meter to direct contact with water.
  • Do not use the sensor with explosive solvents such as gasoline, alcohol, gas … manufacturers will not be responsible for compensation in the event of fire.
  • Sensors should be installed away from corrosive chemicals such as salts, alkalis, acids …