HORN Compact Oil Mist Detector

More than 20.000 systems installed worldwide

The oil mist detectors in the MEV283 series can easily and at low costs be installed on various engines on the crankcase breather. As the system is mounted directly on the pipes, no additional pipping is required in the assembly.

Furthermore, the detectors are available with or without an add-on to measure the pressure in the crankcase. No matter what, the oil mist concentration and the optional oil pressure in the crankcase are measured against the limits, which are set and approved by the machine manufacturer.

If the measurement of the oil mist concentration or oil pressure is above the limits the system will give a signal about the operative operation with either a pre-alarm, pressure alarm, or a main alarm. You can read more about the alarm on the ODM here.

As a standard, you are getting a 4-20mA signal for the ODM to give a signal output about the oil mist concentration and crankcase pressure. Moreover, you have the options of Ethernet and CAN bus versions available as well.

Additionally, the method of measuring with an optical sensor, as well as how the system is installed makes spare parts like pumps, filters, and such unnecessary.  

OBS: The equipment can be installed with a redundant 24V to meet any demand for an independent supply of battery.

Advantages (compared to competitors)

The function of the Oil Mist Detector is much more sensitive than other systems as it is mounted at the top of the engine. Thus, the thermal oil mist needs to come up to the single detection point.

Moreover, you have several advantages in the Oil Mist Detector from HORN compared to the competitors. The ODM is mounted at the breather outlet of an engine, and this is done with good reason as it gives you the following benefits:

• Detects problems in the gear train
• Detects problems with the turbocharger
• Detects much faster than other systems the thermal oil mist from the first cylinder’s systems (less than approx.10sec -> tested)
• Is more sensitive than competitors’ systems as lower shutdown limits are set (less than 0,5% LEL)
• Has a similar reaction time to competitor systems for the last cylinder
• Has no problems with load changes and no false alarms.
• Extremely cost-effective.

Moreover, all competitors are working with compartment-specific sensors. This means, that they place a sensor in each crankcase compartment. In this case, the sensors are sensitive to oil drops that are thrown off the crankshaft.

Or they pull in air from each compartment and evaluate it in a central unit. Then the signals can be partially delayed, and the suction blowers often fail because they are oil-laden. Instead of suction fans, an air-driven ejector can also be used. This is reliable but consumes a lot of air, thus, being expensive for you.

All these systems also have a high cost for piping, wiring, and installation because they consist of many individual parts.

The function of the compact ODM

The compact ODM from HORN can meet the demand for an independent supply of battery and main supply of the classifications because it is available with redundant 24V.

An ‘engine-running’-signal can be used as input from the motor side to operate the system. As the oil mist detectors monitor the actual oil mist concentration and crankcase pressure a galvanic isolated analog signal output 4-20 mA is available for each of the two measured values.

You can simply connect to a monitoring and safety system, as the detector transmits the operating states:

• Ready
• Pre-alarm
• Pressure alarm
• Main alarm.

Read more about the alarms here.

Moreover, there is a configurable reserve relay; Ethernet or CAN bus interfaces can be used for data exchange of operational data, as well as operational parameters.