Cygnus Dive Underwater Ultrasonic Thickness Meter

Cygnus Dive Underwater Ultrasonic Thickness Meter


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 inspection, civil engineering, marine structures and offshore platforms.


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 0.8" (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 a 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

3 Versatile Measuring Modes

  • Multiple-Echo modes uses three error checked back wall echoes to provide the most reliable and accurate remaining thickness measurements, with no need to remove coatings (up to 0.8" / 20mm thick)
  • Single-Echo mode is ideal for measuring uncoated metals with heavy front and/or back wall corrosion. Also effective on a range of cast metals, plastics and composites.
  • Echo-Echo mode works for measuring heavily corroded metals through thin coatings of up to 0.04" (1mm) thick, ideal for measuring painted metals with heavy back wall corrosion.


Variety of Cygnus INOX Transducers

  • Stainless steel SINGLE CRYSTAL transducers, used in multiple-echo mode, include replaceable membranes for long life, require no zeroing and have a high linear accuracy.
  • Stainless steel TWIN CRYSTAL transducers, used in echo-echo and single-echo modes, have improved measurability on extreme back wall corrosion and pitting. 

Cygnus INOX Transducers

Measurement Stability Indicator

Exclusive to Cygnus, MSI™ ensures stable and therefore reliable measurements are displayed in Echo-Echo and Single-Echo modes.

Cyglink Computer Software

CygLink is a Windows® based application for topside computer use to display continuous A-Scan output and measurement data. CygLink has the facility to log both data formats into a Survey file for report presentation, which can be emailed, exported as a PDF, or printed.

Technical Specifications

Cygnus Dive Specifications

Display 2.8” quarter VGA colour LCD (320 x 240 pixels). Large clear thickness measurement (15mm 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.
Battery Single 3.6V Li-ion 8.2 W battery. 10 hours continuous measurement. Low battery warning ‘alert’ message.
Measuring Mode Multiple-Echo using 3 echoes to ignore coatings up to 20mm thick. Echo-Echo using 2 echoes to ignore coatings up 1mm thick. Single-Echo using 1 echo.
Deep Coat In Multiple-Echo mode, allows measurement to be made through thicker coatings of suitable materials of up to 20mm thick.
Accuracy ±0.1 mm or 0.1% of thickness measurement, whichever is greatest, when calibrated in accordance with Cygnus Instruments calibration procedure.
Probe Options Single crystal probes and Twin crystal probes
Probe Cables Double outer jacket in tough PU. Colored yellow for easy locations underwater. Coiled for ease of use. Fischer S105 series connectors.
Measurement Range in Steel 0.039" - 10" (1 - 250 mm) depending on selected probe and configuration, material and temperature.
Measurement Resolution Multiple-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 Units inches or mm
Probe Zero Fully automatic probe zeroing for all probes types
V-Path Correction Automatic V-Path correction for all twin crystal probes
Velocity Range 2000 to 9000 m/s in 1 m/s steps
Pulser Twin 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 5000 points including 640 point A-scan data.
Data Output RS-485 single pair, half duplex for surface connection
Standards Designed for EN 15317
Compliance CE, UKCA, RoHS
Warranty 3 years on gauge and 6 months on probe

Cygnus Dive Kit Includes

  • 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

Options and Accessories

  • 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 984 ft, and designed for use in situations with extremely poor visibility and ease of viewing by the diver.

Product Literature

Description Part # Saved Price Select Option Add to


Cygnus Dive Mk3 UTG Kit (without probe) Includes: Unit w/wrist strap, 2 batteries, Charger w/base & cable, Membrane Couplant & UT Couplant Gel, Test Block, Membrane Key, Silicone Grease, USB w/documentation, Calibration Certificate & Operating Manual UT-CY-001-7200/3 $4,321.00


Probe S2C Single Crystal 2.25 MHz 1/2" (13mm) for Cygnus DIVE UTG UT-CY-001-7230 $987.00
Probe S3C Single Crystal 3.5 MHz 1/2" (13mm) for Cygnus DIVE UTG UT-CY-001-7231 $1,064.00
Probe S5C Single Crystal 5 MHz 1/2" (13mm) for Cygnus DIVE UTG UT-CY-001-7232 $1,077.00
Probe S5A Single Crystal 5 MHz 1/4" (6mm) for Cygus DIVE UTG UT-CY-001-7233 $1,103.00
Probe T5B Twin Crystal 5 MHz 1/2" /5/16" (13 / 8 mm) for Cygnus DIVE Mk2 UTG UT-CY-001-7235 $1,064.00
Probe T2C Twin Crystal 2 MHz 2/3" / 1/2" (17/12mm) for Cygnus DIVE Mk2 UTG UT-CY-001-7236 $1,064.00

Optional Accessories

Topside Repeater (TSR) Kit for Cygnus DIVE UTG (includes Umbilical Connectors - add cable) UT-CY-001-7221/4 $1,548.00
Topside Repeater (TSR) Kit with Video OSN for Cygnus DIVE UT-CY-001-7218/1 $1,803.00
Umbilical Cable for DIVE / UW / ROV to Topside Repeater (TSR) Kit (per meter) UT-CY-001-0415 $4.19
HelmetView Mk2 Remote Display Kit for Cygnus DIVE UTG UT-CY-001-7224/2 $832.00