IMO MARPOL regulation 15,(3)(b) states effective Oil-Water Interface detectors approved by the administration shall be provided for a rapid and accurate determination of Oil-Water Interface in slop tank and shall be available for use in other tanks where the separation of oil and water is effective and from which it is intended to discharge effluent direct to the sea.

MMC Portable triple function (Ullage / Temperature / Oil-Water Interface) Gauging Device "SONIC TAPE" MODEL. "D-2401-2" has been inspected and type-approved by the administration according to the specification MEPC.5(XIII) as Oil-Water Interface detector and being circulated to IMO member.

Oil-water interface detector is a required device of Council Directive 96/98/EC on Marine Equipment MED and is inspected by DNV (Notified Body) appointed by EU signatories. Accordingly EU signatories provide MMC MODEL. D-2401-2 with the Wheel Mark.

This Portable Tank Gauging Tape Device "SONIC TAPE" is an intrinsically safe apparatus approved by the authority, it can be used in the dangerous flammable atmosphere under the category of Ex ia IIB T4.

Construction of the "SONIC TAPE" is Conductive graduated tape, Sonic sensing probe (Triple Function) and Operation board (electrical hub PCB operated by battery) in the body component (Tape Reel Ass'y with Storage Barrel).
It is able to gauge Ullage, Oil-Water Interface level and Temperature of cargo liquid in tank Directly, Accurately, Easily and Safely on the Vapor Locks (so called in Marine Safety Criteria for industry vessels against Tank Gauging Station) installed on deck of the tanker as Closed(Restricted) device.

[- REFERENCE FOR RESTRICTED DEVICE - THE U.S.C.G. REPORTED THAT "THE COAST GUARD MARINE SAFETY CENTER (MSC) CONCERNING USE OF A RESTRICTED DEVICE (A DEVICE WHICH PERMITS ONLY A SMALL QUANTITY OF CARGO VAPORS TO ENTER THE ATMOSPHERE) CAN BE USED TO COMPLY WITH 45 CFR PART 39.30-1(i)."]