Cygnus Hatch Sure

Ultrasonic Tightness Tester

This lightweight and user friendly ultrasonic leak detector has been designed to locate leaks and identify failures in the seals of any closing appliances or compartments, such as weathertight doors on maritime vessels, watertight doors (WTDs) or windows on any structures from transportation vehicles to offshore oil & gas platforms.

Key Features of the Cygnus Hatch Sure Ultrasonic Tightness Tester

  • Simple and quick to operate, with minimal training
  • Pinpoint the exact location of leaks and help assess seal degradation
  • Ideal for inspecting weathertight and watertight seals of doors or any critical closing infrastructure that must be sealed to function correctly
  • 6 adjustable power levels that allow the unit to be used in a wide array of areas
  • Digital calibration controls
  • Inspections can be carried out without having to clear the area
  • Lightweight 8 lbs (3.8 kg) and portable in a rucksack-style carry case
  • Open Hatch (OH) value and sound level in Decibels (dB) are both displayed
  • Receiver supplied with neck and waist straps for hands-free use
  • Transmitter supplied with a sling & 4 anchor points allowing it to be lowered into position
  • ABS type approved and accepted by P&I clubs.

Evaluate watertight integrity of seals using Ultrasonic Testing (UT)

Ultrasonic testing provides a simple and reliable method of checking seals of any closing appliances or structures.

Cygnus Hatch Sure solution comprises a lightweight transmitter (battery powered) and a receiver coupled with telescopic extension inspection microphones.

The transmitter is powerful: 19 ultrasound emitters (40 kHz) distribute an omni-directional field of sound which uniformly fills the areas under test.

With the sealing infrastructure closed, the receiver will then detect any ultrasound that gets through any gaps in the closed door or compartment and displays the sound that has been detected, thus identifying the location of damaged seals and associated leaks quickly and reliably.

Hatch Sure Receiver

Size110 x 185 x 45 mm (4.4 x 7.3 x 1.8 inch)
Weight500 g (17 oz) (inc. batteries)
Power9v PP3 battery – 2 x MaxE
Rechargeable batteries supplied
Battery Life4 – 5 hrs continuous with MaxE rechargeable battery
8 – 9 hrs continuous with Alkaline battery
ProtectionIP65 (IP66 in soft-pouch)
Frequency40.000 KHz, +/- 200 Hz Bandwidth
EnclosureABS plastic with orange shock-absorbing outer boot
Outdoor all weather soft-pouch with mounted belt strap
Temperature RangeOperating: -20oC to 50oC (-4oF to 122oF)
Storage: -10oC to 60oC (14oF to 140oF)
Warranty3 years

Hatch Sure Inspection Microphone

Size240 x 12 x 15 mm (9.4 x 0.47 x 0.6 inch) (with rubber sleeve fitted)
Warranty6 months
Quantity2 x flexible inspection microphones supplied

Hatch Sure Telescopic Extension

SizeExtended length: 1.215 m (4 ft)
Collapsed length: 0.4 m (16 inch)
Weight300 g (10 oz)
1 year

Hatch Sure Transmitter

Size120 x 150 x 90 mm (4.7 x 5.9 x 3.5 inch)
Weight680 g (24 oz) (inc. batteries)
Power12 x Rechargeable MaxE 2100 mAh supplied with kit (alternatively 6 x AA batteries)
External 12-24 v DC power input socket (1 amp)
Battery Life4 hours with 2100 mAh MaxE batteries
Battery ChargerA 6 cell charger is supplied
100 – 240 v AC 50-60 Hz supply
Charge time is approx. 3 hours
ProtectionIP40 in soft-pouch with emitters exposed (normal use)
IP42 in soft-pouch with cover flat secured (storage)
Frequency40.000 kHz, +/- 80 Hz Bandwidth Frequency modulated
Elements19 x 16 mm (0.63 inch) diameter 40 KHz ultrasound emitters
Max. Power130 dB (SPL)
Output6 selectable pre-set power levels – full power
5 selectable lower outputs in 11 dB steps
EnclosureABS plastic
Padded soft-pouch with protective weather cover and 4 points for attaching rope for lowering into holds
Temperature RangeOperating: -20oC to 50oC (-4oF to 122oF)
Storage: -10oC to 60oC (14oF to 140oF)
ComplianceCE, BS EN 60945:2002 (Maritime navigation and radio communication equipment and systems – General requirements – Methods of testing and required test results)
EnvironmentCE, UKCA, RoHS
Warranty3 years


  • 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.
Weight5 kg

4 reviews for Cygnus Hatch Sure

Wagner C.

Sep 30, 2015 11:30 AM

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.

Ammar M.

Apr 20, 2017 11:29 AM

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

Orçun Ç.

Dec 26, 2017 11:31 AM

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

Tony D.

Mar 31, 2021 11:32 AM

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

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