Oil mist concentration detector MD-SX DAIHATSU Japan Daihatsu

Oil mist concentration detector MD-SX DAIHATSU Japan Daihatsu

1、 Functional Features

1. ‌Continuous monitoring and self checking function‌

• Real time monitoring of oil mist concentration in each cylinder of the diesel engine crankcase, and supporting multi-channel parallel/series detection27.

• When the oil mist concentration exceeds the self-test line (usually 10% of the alarm value), the self-test program is automatically initiated to locate and display the abnormal cylinder28.

2. ‌High sensitivity and accuracy‌

• Using the principle of light scattering to detect oil mist particles, the sensitivity reaches 0.0x mg/L level, and supports the technical solution of combining infrared light source and photoelectric receiver67.

• Optimize heat transfer design to ensure that the convective heat transfer coefficient of the cold and hot medium channels is close, and improve detection stability1.

3. ‌Modularity and reliability‌

• Distributed design, each probe works independently and is connected to the main control unit through cables, supporting expansion to multiple devices for monitoring7.

• Built in shock absorption measures to adapt to complex working environments such as ships2.

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2、 Structural Design

• ‌Detection unitIncludes infrared emitting diode, photoelectric receiving diode, and detection chamber, which sucks in gas through negative pressure and analyzes oil mist concentration using light scattering effect67.

• ‌sampling systemAdopting a spiral airway to shorten the length of the sampling tube, promote oil mist condensation, and reduce interference from large oil droplets7.

• ‌control unitSupport remote monitoring, the main control machine can display real-time concentration bar charts or numerical tables7.

3、 Technical principles

• ‌Light scattering detectionNear infrared light source illuminates oil mist particles, and the scattered light intensity is proportional to the oil mist concentration. The signal is received by a photoelectric tube and converted67.

• ‌Negative pressure samplingCreate negative pressure in the detection room through the exhaust fan, gently inhale gas to avoid disturbance7.

4、 Application scenarios

• Mainly used for monitoring abnormal oil mist concentration caused by bearing overheating and piston ring damage in marine diesel engine crankcases46.

• Suitable for industrial equipment that requires explosion-proof and high humidity environments48.

5、 Maintenance and troubleshooting

1. ‌Common Faults‌

• ‌Negative pressure alarmReplace the air filter or clean the flow control hole8.

• ‌false alarmPossible causes include water content in the lubricating oil, high environmental humidity, or improper sensitivity settings. Parameter adjustment or filter inspection is required8.

2. ‌Maintenance Recommendations‌

• Regularly clean the infrared probe filter (can be wiped with an alcohol swab)8.

• Check the cleanliness of the drive air flow and control valve filter8.

6、 Precautions

• Avoid smoke or high humidity environments near the detector to prevent accidental triggering8.

• Sensitivity settings should be combined with actual working conditions to avoid frequent false alarms caused by excessive sensitivity
  

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Oil mist concentration detector MD-SX DAIHATSU Japan Daihatsu

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