Cygnus Hatch Sure

Ultrasonic Hatch Cover Leak Detector

(5 customer reviews)

Cygnus Hatch Sure is an ultrasonic leak detector able to perform a quick and effective evaluation of cargo hold hatch covers and door seals to determine water leaks and weather tightness.

The system consists of a battery powered transmitter containing 19 ultrasound emitters (40 kHz). The emitters are arranged to produce an omni-directional sound field, uniformly distributed throughout the cargo hold.

The receiver part of the system displays the sound energy level that passes through gaps in the enclosed cargo hold to enable the location of leaks to be quickly and accurately identified.

Cygnus Instruments builds all of its equipment in the UK using only genuine and original parts and components – including Lemo® Connectors and Peli® Cases.

Add On Options



  • ABS Type Approved and accepted by P & I clubs
  • Lightweight (3.8 kg) – suitable to be hand-carried onto aircraft
  • Digital calibration controls
  • Open Hatch (OH) value and sound level in Decibels (dB) are simultaneously displayed
  • Powerful and robust transmitter
  • Easy transportation in a rucksack-style carry case
  • Receiver supplied with neck and waist straps for hands-free use
  • The transmitter has 6 selectable pre-set power levels enabling the unit to be used in confined spaces
  • Transmitter fitted with shoulder strap for convenience and safety
  • Inspections can be carried out with cargo in place
  • Allows a rapid and thorough test of hatch cover tightness
  • Environmentally friendly – can be used in place of hose testing
  • Can be used in sub zero temperatures
  • 3 year warranty.

Hatch Sure Receiver


Size 110 mm x 185 mm x 45 mm (w x h x d)
Weight 500 g (inc. batteries)
Power 9v PP3 battery – 2 x MaxE
Rechargeable batteries supplied
Battery Life 4 – 5 hrs continuous with MaxE rechargeable battery
8 – 9 hrs continuous with Alkaline battery
Protection IP65 (IP66 in soft-pouch)
Frequency 40.000 kHz, +/- 200 Hz Bandwidth
Enclosure ABS Plastic with orange shock-absorbing outer boot
Outdoor all weather soft-pouch with waist mounted belt strap
Temperature Range Operating -20oC to +50oC
Storage -10oC to +60oC
Warranty 3 years


Hatch Sure Inspection Microphone


Size Length 240 mm
Diameter 12 mm
15 mm with rubber sleeve fitted
Warranty 6 months


Hatch Sure Telescopic Extension


Size Extended length 1.215 m
Collapsed length 0.4 m
Weight 300 g
Warranty 6 months


Hatch Sure Transmitter


Size 120 mm x 150 mm x 90 mm (w x h x d)
Weight 680 g (inc. batteries)
Power 12 x Rechargeable MaxE 2100 mAh supplied with kit (Alternatively 6 x AA batteries)
External 12-24 v DC power input socket (1 amp)
Battery Life 4.5 hours with 2100 mAh MaxE batteries
Battery Charger A 6 cell charger is supplied 100 to 240v AC 50-60 Hz supply
Charge time is approx. 3 hours
Protection IP40 in soft-pouch with transmitter elements exposed (normal use)
IP42 in soft-pouch with cover flat secured (storage)
Transmitter Frequency 40.000 kHz, +/-80 Hz Bandwidth Frequency Modulated
Transmitter Elements 19 x 16 mm diameter 40 kHz ultrasound transmitters
Max. Transmitter Power 130 dB (SPL) min
Transmitter Output 6 selectable pre-set power levels – full power and 5 selectable lower outputs in 11dB steps
Enclosure ABS plastic
Padded soft-pouch with protective weather cover and 4 points for attaching rope for lowering into holds
Temperature Range Operating -20oC to +50oC
Storage -10oC to +60oC
Warranty 3 years
Compliance CE, BS EN 60945:2002
(Maritime navigation and radio communication equipment and systems – General requirements – Methods of testing and required test results)
Environmental RoHS, WEEE complient


  • Hatch Sure receiver with protective case, neck and waist strap
  • Telescopic extension and cable
  • Two flexible inspection microphones
  • Neck band headphones
  • Hatch Sure transmitter with protective case and carry strap
  • Rechargeable batteries for the transmitter
  • Rechargeable batteries for the receiver
  • Charger for the rechargeable batteries
  • Operation manual
  • External DC power lead for the transmitter
  • Emergency microphone cable.

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5 reviews for Cygnus Hatch Sure

  1. Wagner C.

    I’m pleased to inform you that this month I completed the one hundred and twentieth vessels inspection and I’m entirely satisfied with the Cygnus Hatch Sure equipment.

  2. Ammar M.

    Item was used with total satisfaction, we shall keep in touch for further purchases soon.

  3. Orçun Ç.

    Device is working very well, we have used many devices but this one is far ahead from others.

  4. Tony D.

    A super piece of kit, and our go to detector when performing yacht hatch and door ultrasonic leak detection testing.

  5. Tony D.

    This is a super piece of kit, the Cygnus Hatch Sure ultrasonic hatch cover leak detector combined with our procedures and experience certainly helped in gaining Geo Therm Ltds aproval for service supplier status with LR and ABS.

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