Bilge Monitoring - 15ppm Bilge Alarm

15 ppm Bilge Alarm sensor

A 15ppm Bilge Alarm is normally used in connection to a ship's oil filtering equipment (also known as "bilge water separator"), monitoring the oil content of the separated/filtered water and stopping the discharge into the sea if the oil content exceeds 15ppm (parts per million).

The 15 ppm bilge alarm type "BilgMon 488" is type approved for this purpose according to latest IMO Rules MEPC.107(49).

Furthermore the 15ppm bilge alarm can in principle be used as a simple oil content alarm for other applications where the water does not contain solids or other substances disturbing the operation.

Cheaper to Replace than Repair

When a complete new bilge water separator is delivered to an existing ship or to a new building, the separator already contains a 15 ppm bilge alarm. However, when the 15ppm bilge alarm on an existing ship is broken beyond repair, or repairing the bilge alarm would be almost as expensive as a new one, the best solution is to replace the old alarm with a new one.

If your old model comes with the RTC failure alarm please contact us directly for support on how to move forward. 

Contact our expert for more information about utilization, implementation and price.

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Simple to Install

The BilgMon 488 is compact and simple to install as a replacement for most old 15ppm alarms. The ship's crew can normally do it in less than an hour. A competitive price and immediate availability makes it an attractive choice for any ship having trouble with the old 15ppm bilge alarm. Please also find the bilgmon 488 manual attached to the right side of the page. 

When the bilgmon 488 measuring cell needs a re-calibration it is extremely easy to replace to a new cell, it can be done by the crew onboard and take around 5 minutes.

  • Simple design
  • Easy to operate
  • Compact system, optimal for a retrofit
  • Fast delivery
  • Competitive prices

Spare part list for the Bilgmon488

We deliver all the necesarry spares for the bilgemon488 quickly and cost effective using below product code: 

  • Sensor unit: BM201001A-1
  • Master Unit: BM201001A-2
  • Magnetic valve assembly: BM201001A-3
  • Calibration check kit: BM201001A-4

If you need a new versions or have lost the bilgmon 488 software, please contact us for support. 

15 ppm Bilge Monitor Tube Arrangement - Bilge ship    
One of many possible tube alternatives
(Click image to enlarge)

Rules and Regulations for 15 ppm Bilge Alarms

According to MARPOL Annex I, ships of 400 gross tonnage and above must be fitted with a bilge water separator, and on ships of 10000 gross tonnage and above the bilge water separator must additionally be fitted with a 15 ppm bilge alarm. However, ships between 400 and 10000 gross tonnage are also required to have the 15ppm alarm in order to be allowed to operate the bilge water separator when the ship is in one of the following "Special Areas" as defined by MARPOL.

  • The Mediterranean  Sea
  • The Black Sea
  • The Baltic Sea and the North West European waters
  • The Red Sea and the Gulf of Aden
  • The Arabian Gulf
  • The Oman area of the Arabian Sea.

For details see Reg.14 & 15 of MARPOL Annex I (Consolidated Edition 2006).

Ships built before 2005 may operate with equipment meeting the requirements of older IMO Rules, but ships built in 2005 and later must be fitted with bilge separators and 15ppm bilge alarms type approved According to MEPC.107(49).

For details see paragraph 1.3 of MEPC.107(49).

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Key Features

  • Easily retroffited onto any system
  • Very cost friendly
  • Calibration by replacement - easily done by crew

Contact our expert

Martin Søvind Jensen

+45 2761 4502