An Oil content monitor is a device for real-time sampling and measuring of the oil content in a moving stream of water. The new IMO/MEPC 107 (49) oil content monitors for oil water separators perform several functions including preventing illegal “over limits” discharges that occur when the oil content is above 15 ppm, by either shutting down the separator or by putting the separator into a recirculation or recycle mode where the oily bilge water is sent back to the oily wastes holding tanks.
These newer monitors also can alarm the operator with audible and visual alerts as well as having dry contacts out that can be wired into a ship’s or oil platform’s main control systems.
SkimOil’s oil content monitors log the past 18 months’ discharge events, and it is this log that the USCG uses to determine that discharges are in compliance and legal. The log can be downloaded through the onboard output port on the monitor. These monitors are sealed and secured to prevent any tampering. Our marine oil water separators can be USCG/ABS/BV certified only when they use an approved monitor.
At SkimOil we use oil content monitors on our BRUTE marine oil water separators, Bilge Filters and for industrial process measurement purposes. Our marine oil water separators can be USCG/ABS/BV certified only when they use an approved monitor.
About BILGMON 488 Oil Content Monitors
The 15ppm bilge alarm type BILGMON 488 is type approved to meet the requirements of IMO Resolution MEPC.107(49), and with its small dimensions it is ideal also for retrofit on existing separators.

In connection to IOPP certificate renewals, the smart detachable measuring cell with wireless communication is easy to remove and replace with a newly calibrated cell, if this is preferred to having the system accuracy checked on board. On special request the BILGMON 488 is also available as a 5ppm version meeting the requirements of Class notation “Clean Design”.
TECHNICAL FEATURES
- Oil content range 0 – 30ppm (current output 0-20mA or 4-20mA)
- Approvals according to MEPC.107(49)
- Power supply 115/230 VAC or 24V AC/DC
- Measuring cell with wireless communication, easy to replace
- Automatic fresh water flushing
- User interface LCD display and keypad
- Data retrieval via LCD display or USB
- Supplied complete with 3-way flushing valve, piping set, connectors
BILGMON 488 SPESIFICATION
Versions: When ordering, specify high voltage (115/230V AC) or low voltage (24V AC/DC) version. | ||
Measurement: | Oil range | : 0 – 30 ppm |
Resolution | : 0.1 ppm | |
Accuracy | : According to IMO MEPC.107(49) | |
Response time: | < 3 sec | |
Alarms: | Alarm 1 (valve control) delay | : 0-10 sec user adjustable |
Alarm 2 (annunciation) delay | : 0-600 sec user adjustable | |
Alarm points 1 and 2 | : 1-15 ppm user adjustable | |
Alarm hysteresis | : 0.5 ppm (below alarm point) | |
Data storage and retrieval: | Calibration storage | : Stored in sensor housing |
IMO required data | : Stored in BilgMon488 main housing (sensor housing may be replaced with data remaining on board) | |
IMO required data retrieval | : Via LCD display or USB | |
User interface: | LCD display | : 2×16 alphanumeric display |
Control | : 4-button keypad | |
Input/Output: | Current output | : 0 – 20 mA or 4 – 20 mA for 0 – 30 ppm |
Communications | : USB serial communication (separate cable and software) | |
Alarm outputs | : 115/230 V AC model: 2 x relays (0.25A) | |
24 V AC/DC model: 2 x relays (1A) | ||
Clean water solenoid valve output | : 115/230 V AC model: 1 x relay (0.5A, supply voltage) | |
24 V AC/DC model: 1 x relay (1A, supply voltage) | ||
Switch input | : 1 x switch input for separator status | |
System and supply: | Supply, High voltage version | : 1 A, 115 or 230 V AC, 50 – 60 Hz |
Supply, Low voltage version | : 1.5 A, 24 V AC (50 – 60 Hz) or 24 V DC | |
Power consumption electronics | : 10 VA | |
Power consumption solenoid | : 18 VA |
Source: www.skimoil.com
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