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ABS Classification Society Manufacturing Process Approved
ISO 9001:2000 Certification Number GB13487
IIMS Corporate Membership Number C508
NCAGE Number U0B22
Nautical Institute Membership Number CA00059
NFPA Membership Number 2800960


DOOR-SAFE™ Water-Tight Tester                                                                

Door-Safe triple mk2Criss cross extension arm

Overview of the DOOR-SAFE™

ABSThe fully ABS Type Approved Door-Safe™ ultrasonic kit is used to rapidly and accurately test the integrity of water-tight doors and hatches.

The Door-Safe™ WT tester kit consists of 2 units, an ultrasonic transmitter unit and a portable, hand-held receiver unit connected to a flexible inspection microphone and hard-hat compatible headphones.  The transmitter and receiver are each supplied in protective leather cases fitted with neck straps to allow for hands-free use.  The complete Door-Safe™ kit is contained in a blue plastic foam-lined carry case for easy transportation and storage.

If ultrasound can pass through the door or hatch seals, then it is also true that water may be able to pass through.  The Door-Safe™ transmitter generates ultrasound on one side of the door or hatch and the receiver unit on the other side of the door tries to detect any ultrasound.  If none can be detected the door is water-tight.  Any ultrasound that has leaked through is shown on the receiver unit in decibels on the digital LCD display and also converted to an audible sound, which can be heard through the headphones.  The size of the problem can also be established from the strength of the signal displayed in dB (decibels.) which is the Classification Society DNV requirement.

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Door-Safe™ Applications

The Class Instrumentation Ltd Door-Safe™ can be used to determine the integrity and water-tightness of

Please note, this unit is not for use on bulk cargo hatch covers.  If you wish to know the integrity of hatch covers, please see our Cargo-Safe unit.

The complete DOOR-SAFE™ kit includes:

DOOR-SAFE™ Technical Specifications

DOOR-SAFE™ TransmitterDoor-Safe Transmitter

DOOR-SAFE™ Receiver Door-Safe receiver mk2

MicrophoneDoor-Safe Microphone and Lead

Extension arm Criss cross extension arm

Headphones with 3.5mm stereo jack plug, volume control independent of digital displayDoor-Safe Headphones


How to Operate the DOOR-SAFE™ Water-Tight Tester

1. Plug in the headphones and inspection microphone to the receiver unit.

2. Turn on the transmitter unit and place on one side of the door or hatch.

3. Obtain an open door value as a reference.

4. Close and seal the door and from the other side, pass the inspection microphone over the door seals to see if any of the ultrasound emitted from the transmitter unit can be detected.

5. To be water-tight the value must be 0 dB, if a value of 1-10% of the open door reference value is detected the seal is accepted as weather-tight, any readings above 10% of the open door value and the door is not weather or water tight.


ABS Manufacturing Assessment Certificate Number 16-LD3207821
Door-Safe Type Approval Certificate Number 14-LD1168517-PDA
ISO 9001:2015 Certificate Number 14124458
NATO Stock Number 6635-99-464-5624
NCAGE Number U0B22
IIMS Corporate Membership Number C508

acced monmarineiso-9001abs

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© Copyright 1996 - 2013 Class Instrumentation Ltd

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ABS Classification Society Manufacturing Process Approved
ISO 9001:2015 Certification Number 14124458
IIMS Corporate Membership Number C508
NCAGE Number U0B22
NFPA Membership Number 2800960
FPA Membership Number 27135



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