Cygnus DIVE Underwater Gauge

Ultrasonic Thickness Gauge

A robust, wrist-mountable ultrasonic underwater thickness gauge, providing an invaluable free hand while performing Ultrasonic Thickness Measurement (UTM) underwater. The Cygnus DIVE also offers a large, bright display with live A-scan which is easily viewable by both the diver and his camera - even in the poorest visibility.

The Cygnus DIVE is a robust, wrist-mountable ultrasonic underwater thickness gauge – providing an invaluable free hand while performing Ultrasonic Thickness Measurement (UTM) underwater. The large, bright display with Live A-scan is easily viewable by both the diver and his camera – even in the poorest visibility. With only two buttons to press, the gauge is very easy to navigate through an intuitive, user-friendly menu. Ideal for hull UTM inspections, civil engineering, marine structures, offshore platforms, underwater structures, subsea pipelines and equipment, UWILD or IWS class surveys.

Key Features:

  • 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 20mm 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 colour 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, probe 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 20 mm (0.8 inch) thick.
Echo-Echo using 2 echoes to ignore coatings up 1 mm (0.04 inch) 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 20 mm (0.8 inch) thick
Accuracy±0.1 mm or 0.1% of thickness measurement, whichever is greatest, when calibrated in accordance with Cygnus Instruments calibration procedure
Probe OptionsSingle crystal probes and Twin crystal probes
Probe CablesDouble outer jacket in tough PU. Coloured yellow for easy locations underwater
Coiled for ease of use. Fischer S105 series connectors
Measurement Range in Steel1 – 250 mm (0.039 – 10 inch) depending on selected probe and configuration, material and temperature
Measurement ResolutionMultiple-Echo with single crystal probes – 0.1 or 0.05 mm
Single-Echo and Echo-Echo with twin crystal probes – 0.1 or 0.01 mm
Measurement Unitsmm or inches
Probe ZeroFully automatic probe zeroing for all probes types
V-Path CorrectionAutomatic V-Path correction for all twin crystal probes
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 gauge and 6 months on probe
Weight5 kg

Cygnus DIVE Gauge Standard Kit WITHOUT 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 gauge 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 300 m (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 Gauge

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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Cygnus DIVE Brochure

Cygnus Subsea Range Brochure

Cygnus DIVE – Consumables Reorder Form

Cygnus Video

Cygnus DIVE Underwater Ultrasonic Thickness Gauge in Action

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