| 摘要 |
PURPOSE:To prevent trouble such as a decrease in the life of equipment bearing, etc., by catching a small current which flows when water is mixed with oil and finding water entry in its early stage. CONSTITUTION:Electrodes for a detecting device are so constituted that two large and small cylindrical metallic plates 3 and 4 are arranged double and elecetrode terminals 1 and 2 are provided to the respective metallic plates across a lid type electrode terminal box 6 and protected by a bottomed cylindri cal cover 5 which has an oil port 7. A constant voltage is applied by a DC stabilized power source 8 into a detecting circuit 10 and this voltage is adjusted while confirmed on a DC voltmeter 10. Then, no current flows between a main electrode 1 and a counter electrode 2 because the oil is an insulator unless water is mixed with the oil. Then, if water is mixed, water becomes electrically conductive and a flowing current varies with the amount of mixed water, so the amount of mixed water is read on an indicator (mA meter) 11. |
