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.

Kit contents

  • 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.


Size110 mm x 185 mm x 45 mm
(4.3″ x 7.3″ x 1.8″) W x H x D
Weight500 g (17oz) including 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 waist mounted belt strap
Temperature RangeOperating -20oC to +50oC (-4oF to 122oF)
Storage -10oC to +60oC (14oF to 140oF)
Warranty3 Years

Kit contents

  • 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


Hatch sure inspection Microphone
Hatch sure telescopic extension
Hatch sure transmitter
Hatch sure inspection Microphone

SizeLength 240 mm (9.4 inch)
Diameter 12 mm (0.47 inch)
15 mm (0.6 inch) with rubber sleeve fitted
Warranty1 year

Hatch sure telescopic extension

SizeExtended length 1.215 m (4 foot)
Collapsed length 0.4 m (16 inch)
Weight300 g (10oz)
Warranty1 year

Hatch sure transmitter

Size120 mm x 150 mm x 90 mm
(4.7″ x 5.9″ x 3.5″) W x H x D
Weight680 g (24 oz) including 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 Life4.5 hours with 2100 mAh MaxE batteries
Battery ChargerA 6 cell charger is supplied 100 to 240v AC 50-60 Hz supply
Charge time is approx. 3 hours
ProtectionIP40 in soft-pouch with transmitter elements exposed (normal use)
IP42 in soft-pouch with cover flat secured (storage)
Transmitter Frequency40.000 kHz, +/-80 Hz Bandwidth Frequency Modulated
Transmitter Elements19 x 16 mm (0.63 inch) diameter 40 kHz ultrasound transmitters
Max. Transmitter Power130 dB (SPL) min
Transmitter Output6 selectable pre-set power levels – full power and 5 selectable lower outputs in 11dB 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)
Warranty3 years
ComplianceCE, BS EN 60945:2002
(Maritime navigation and radio communication equipment and systems – General requirements – Methods of testing and required test results)
EnvironmentalRoHS, WEEE complient

Tripod for use with hatch sure
Hatchsure TX tripod bracket with Velcro
BNC straight adapter for HATCH SURE receiver
Tripod for use with hatch sure

Tripod for use with the Cygnus Hatch Sure (P/N 006-1056).

Hatchsure TX tripod bracket with Velcro

Cygnus Hatch Sure Tx Tripod bracket with Velcro (P/N 006-1054).

BNC straight adapter for HATCH SURE receiver

BNC straight adapter for the Cygnus Hatch Sure receiver (P/N 006-1017).

Download CYGNUS HATCH SURE​​ brochure

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