| 摘要 |
A fluid level detector (1) comprises a thermoresistive probe (6) and a controlling circuit (8). The probe replaces the conventional dip stick on internal combustion engines and other machinery having an oil sump and a dip stick tube. The probe comprises an elongated wand (9) of insulative material to which is threaded a length of thermoresistive wire, the resistance of which varies with the amount of immersion thereof into the oil. The circuitry operates various light emitting diodes for alerting operating personnel of the oil level. The probe wire is connected to the circuitry via conductive strips bonded to the wand and conductive elements in contact with the strips and leading to the circuit. An insulative sheath surrounds the wand and strips. A rubber grommet (25) attached to the upper end of the probe seals the machine dip stick tube. |
