15PPM Bilge Alarm Inquiry Application: Bilge alarm(oil content meter) has been designed specifically for use in conjunction with 15 ppm oil-water separator units. Standard: Its performance meets the requirements of the International Maritime Organisation specifications for 15 ppm bilge alarms contained in resolution MEPC. 107(49). Bilge Alarm Type: Common type and explosion-proof type bilge alarm Approval Certificate: CCS,GL,DNV