Cygnus DIVE Underwater

Ultrasonic Thickness Meter

Providing an invaluable free hand while performing underwater ultrasonic thickness measurement, the Cygnus DIVE is a robust, wrist-mountable ultrasonic underwater thickness meter with a large, bright display with live A-scan making it easily viewable by both the diver and camera - even in the poorest visibility.

Key Feature of the Cygnus DIVE Underwater Ultrasonic Thickness Meter

  • Multiple-Echo mode for accurate, through-coat measurements as specified by Classification Societies
  • Single-Echo and Echo-Echo modes for heavily corroded metals with a thin or no coating
  • Deep-Coat function to ignore coatings up to 0.8 inch (20 mm) thick
  • A-scan display to assist with measurement verification
  • Optional Data Logging feature with Auto-Log – storing up to 5000 measurements including A-scan data without pressing any button
  • MSI™ (Measurement Stability Indicator) verifies stable, reliable readings
  • Rechargeable lithium-ion battery giving up to 10 hours continuous measurement
  • Optional remote display HelmetView™, Topside Repeater and CygLink surface display software.


Display2.8” quarter VGA color LCD (320 x 240 pixels). Large clear thickness measurement (15 mm high numbers), viewable from all angles. A-scan display with automatic X axis. Battery level, signal strength, transducer type, velocity. Measurement mode and units indication.
BatterySingle 3.6V Li-ion 8.2 W battery. 10 hours continuous measurement. Low battery warning ‘alert’ message.
Measuring ModesMultiple-Echo using 3 echoes to ignore coatings up to 0.8 inch (20 mm) thick
Echo-Echo using 2 echoes to ignore coatings up 0.04 inch (1 mm) thick
Single-Echo using 1 echo
Deep CoatIn Multiple-Echo mode, allows measurement to be made through thicker coatings of suitable materials of up to 0.8 inch (20 mm) thick
Accuracy±0.1 mm or 0.1% of thickness measurement, whichever is greatest, when calibrated in accordance with Cygnus Instruments calibration procedure
Transducer OptionsSingle crystal transducers and Twin crystal transducers
Transducer CablesDouble outer jacket in tough PU. Colored yellow for easy locations underwater. Coiled for ease of use. Fischer S105 series connectors.
Measurement Range in Steel0.039 – 10 inch (1 – 250 mm) depending on selected transducer and configuration, material and temperature
Measurement ResolutionMultiple-Echo with single crystal transducers – 0.1 or 0.05 mm
Single-Echo and Echo-Echo with twin crystal transducers – 0.1 or 0.01 mm
Measurement Unitsinches or mm
Transducer ZeroFully automatic probe zeroing for all transducer types
V-Path CorrectionAutomatic V-Path correction for all twin crystal transducers
Velocity Range2,000 to 9,000 m/s in 1 m/s steps
PulserTwin channel 70 V spike pulser
Receiver / Amplifier
10 MHz bandwidth, 120 dB range, automatic TCG
60 MHz measurement time-base
Data Logging (Optional)
One-handed automatic logging of stable measurements.  Capacity for up to 5,000 points including 640 point A-Scan data.
Data OutputRS-485 single pair, half duplex for surface connection
StandardsDesigned for EN 15317
ComplianceCE, UKCA, RoHS
Warranty3 years on meter and 6 months on transducer
  • Instrument body with wrist strap
  • Ultrasonic transducer with coiled cable
  • 2 rechargeable batteries
  • Membrane couplant
  • Battery charger with charger base
  • AC mains lead for battery charger
  • Ultrasonic couplant gel
  • Test block
  • Spare probe membranes
  • Membrane key
  • Silicone grease
  • USB flash drive with documentation
  • Calibration certificate
  • Operating manual.
Weight5 kg

Cygnus DIVE Gauge Standard Kit with S2C 2.25MHz 13mm Standard Probe, Cygnus DIVE Gauge Standard Kit WITHOUT PROBE, Cygnus DIVE Data Logging Gauge Kit with S2C 2.25MHz 13mm Standard Probe, Cygnus DIVE Data Logging Gauge Kit WITHOUT PROBE

Topside Repeater (TSR) Remote Display Unit

The Cygnus Topside Repeater is a remote display unit connected to the DIVE meter with an umbilical cable. It displays the thickness measurements at the surface in real-time during the survey.


Topside Repeater with Video Overlay

The Topside Repeater can also overlay the real-time thickness measurements on to a composite video signal, displaying it on the survey monitor screen. It will also then be recorded (if there is a video of the survey), showing exact locations and the thickness measurement for future reference.


HelmetView™ Display

This is a remote display with a fixing bracket for Kirby Morgan® Helmets that have an accessory mounting point. This is depth rated to 984 ft, and designed for use in situations with extremely poor visibility and ease of viewing by the diver.

4 reviews for Cygnus DIVE Underwater

Peter H.

Nov 08, 2015 12:55 PM

We used the 5MHz dual crystal as it gave the best results on the pitted steel we found on the many corroded ships hulls where we tried the UT gauge. The DIVE was reliable, very easy to use, has simple menu system and displays. The logging function was essential as we only had 13 minutes on the wreck each day; I could make lots of measurements and figure out the answer back home in post processing, we also didn’t have to write anything down or think too much as thinking isn’t so easy in 40m water with the effects of narcosis!

Aquilino D.

Mar 14, 2017 12:55 PM

We have used the equipment with very good results on a job so far.

Aquilino D.

Mar 28, 2017 12:54 PM

Regarding the MK-2 this has been working very good and we did over 1.000 readings with the same battery on two different days; we are completing a serial of surveys on pontoon ferries with a total of 4,000 readings and so far we are very happy with the device performance.

G Goodman

Aug 17, 2021 9:58 AM

The Cygnus DIVE was simple to use and, like all Cygnus kit, it was good and rugged.

The large display was excellent – and clearly visible even in darker water. Readings were easy to take and snapped up on the screen quickly -which makes our job as divers so much easier.

The twin crystal probes were particularly useful on areas of very heavy corrosion.

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