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marine fuel gauge sending unit
The reading of the marine fuel gauge depends on the oil level sending unit sensor, so the marine fuel gauge sending unit sensor is very important. The scale of the oil gauge suddenly drops to zero, indicating that there is a problem with the oil level sensor of the ship. Normally, the oil level sensor is dirty and needs to be cleaned. Moreover, gasoline contains a lot of impurities, and the oil level sensor is always immersed in it, which will be polluted after a long time, affecting the accuracy of the reading. However, it is necessary that the ship is more than 5 years old, which means that the sensor has been worn and needs to be replaced. The oil level sensor is an oil float, which drives a wire wound sliding resistance. The oil level changes the resistance of the sliding resistance. The oil level sensor is a part that detects the position of the oil in the container by changing the capacitance between the sensor housing and the sensing electrode after the oil enters the container, and transforming this change into the current change.
In general, the marine fuel gauge sending unit is a sliding rheostat. The resistance value is controlled by a float. The resistance value will change with the amount of oil. The output current will change when the load voltage is fixed. The current value is reflected on the automobile instrument and converted to the amount of gasoline oil according to a certain proportion. Generally, due to the irregularity of the fuel tank, the resistance of the rheostat changes irregularly It depends on which manufacturer you use the oil level sensor. Generally, traditional oil level sensors are float controlled. The oil gauge does not move. You can try to remove the oil level sensor, sand the electric shock with sandpaper, and use it when it can be used. If it can't be used, it needs to be replaced.
After filling up the oil, the float rises so high that the contact between the oil level sensor and the sliding vane reaches the edge position, sometimes even disengages, so that the resistance will be very large, which is equivalent to the position when the oil is lacking, and the fuel warning light will naturally alarm. At this time, wrap a few silk cotton threads on the float arm limit block of the oil level sensor, so that when the float arm contacts the limit plate, the contact and the slider do not come off, and the pointer of the oil gauge will correspondingly indicate that the oil tank is full without giving an alarm.
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