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2. Working principle
The oil level sensor consists of float, floating rod, magnetic core, lead wire, etc. The float,
floating rod and magnetic core form a variable resistor. The height of oil level changes,
which drives the float up and down. The position of variable resistor changes, and the
corresponding resistance value is output.
3. Corresponding relationship between instrument display scale and oil level sensor
resistance
Check point
E
F
Note: when one grid is displayed, one grid flashes; when the resistance value is more than 95 Ω ,the 6 cells and
the icon will flash together.
A：High oil level
B：Low oil level
LCD segment
code
1 flicker
1 grid
2 grids
3 grids
4 grids
5 grids
Input cathode（Ω)
R≥95
85≤R＜95
70≤R＜85
36≤R＜70
24≤R＜36
R＜24
Error value
± 2
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