Cygnus 6+ PRO

Ultrasonic Thickness Gauge

Boasting a full range of useful features for professional users, including: A-scan; B-scan; comprehensive data logging; 3 versatile measuring modes; high temperature probe for measuring wall thickness in areas of high-temperature without shutdown or isolation; plus much more.

Key Features of the Cygnus 6+ PRO UTG

  • Multiple-Echo mode for accurate, through-coat measurements as specified by Classification Societies
  • Echo-Echo and Single-Echo modes for heavily corroded metals with a thin or no coating
  • Temperature Compensation feature for measurement on hot materials
  • Deep Coat function ignores coatings up to 20 mm (0.8 inch) thick
  • Manual and automatic gain control
  • Min/max measurement limit functions with visual and vibrate alert
  • Uses single and twin crystal probes
  • Freeze function
  • One and two point calibration
  • Bluetooth™ for data transfer
  • Large front LCD display and end-mounted rotatable
  • LCD display with grayscale setting for bright sunlight
  • Safe operation in explosive atmospheres: Class 1, Division 2, Group D locations only, as defined in NFPA 70, Article 500
  • Water and dust tight IP67 housing
  • Shock and impact proof to US MIL STD 810G.

High Temperature Measurement

  • Using the NEW T5B-MAUH high temperature probe, measurements can be taken on hot surfaces of up to 300°C (572°F).
  • No cooling period required – reducing inspection time and facilitating more effective measurement
  • Option to use standard cable or more robust, braided cable.

Comprehensive Data Logging

  • Linear, 2D grid and template based logging
  • 16 grid patterns available
  • Add radial points to any measurement to further investigate immediately an area of interest or heavy corrosion
  • Eight user-defined text comments to attach to any measurement point
  • Auto-log feature
  • Saves measurements and A-scans
  • Records stored on an SD card
  • CygLink software used to transfer and manage data.

Three Versatile Measuring Modes

  • Multiple-Echo mode 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 20 mm thick (0.8 inch))
  • 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 best for measuring heavily corroded metals through thin coatings of up to 1 mm (0.04 inch) thick, ideal for measuring painted metals with heavy back wall corrosion.

CygLink Computer Software

CygLink is a Windows® based application used to transfer and manage data logger records, A-scans, measurement comments and material velocity tables. The program can generate PDF reports and export to Excel. It also displays A‑scans, allowing for after-the-event analysis of logged measurements.

The latest version of CygLink software is available to download from ‘Software Downloads’.

Measurement Stability Indicator (MSI™)

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

Multiple-Echo Ignores Coatings up to 20 mm (0.8 inch) Thick

Measuring Heavily Corroded Metals

Echo-Echo Mode Ignores 1 mm (0.04 inch) Thick Paint

Cygnus Thickness Gauge Impact Test

Cygnus Thickness Gauge Water Resistance Dunk Test

Cygnus Thickness Gauge Water Resistance Hose Test

Cygnus 6+ Dual Display

Large Bright LCD Display

Large LCD Display and Simple Menu Operation

Measuring Uncoated Small Diameter Pipes

Measuring Small Diameter Pipes Through Coatings

A-Scan on Corrosion


Measuring Modes Multiple-Echo using 3 echoes to ignore coatings up to 20 mm (0.8 inch) thick.
Echo-Echo using 2 echoes to ignore coatings up to 1 mm (0.04 inch) thick.
Single-Echo using 1 echo
Materials Velocities from 1,000 – 9,000 m/s (0.0390 – 0.3543 in/us)
Accuracy ±0.05 mm (±0.002 inch) – in Multiple-Echo measurement mode, when calibrated and measuring the same material as calibrated on
±0.1 mm (±0.004 inch) or 0.1% of thickness measurement whichever is the greatest – in Single-Echo & Echo-Echo measurement modes, when calibrated and measuring the same material as calibrated on
Resolution Multiple-Echo mode – 0.1 mm (0.005 inch) or 0.05 mm (0.002 inch)
Single-Echo and Echo-Echo modes – 0.1 mm (0.005 inch) or 0.01 mm (0.001 inch)
Probe options Single crystal probes, Twin crystal probes and High temperature probe
Measurement Range in Steel 0.8 – 250 mm (0.031 – 10 inch) depending on selected probe and configuration, material and temperature
Connector 2 x Lemo 00
Power 3 x AA / R6 batteries
Battery Life Approx. 10 hours continuous measurement
Electronics Dual channel pulser
Display Front LCD 2.4 inch QVGA: 47 x 37 mm
End-mounted LCD: 25.58 x 6.38 mm
Size 84 x 130 x 35 mm (3.3 x 5.1 x 1.4 inch)
Weight 300 g (10.5 oz) (inc. Batteries)
Operating Temp. -10°C to 50°C (14°F to 122°F)
Data Logging 5,000 measurements and A-scans per record
Max number records: 100 (soft limit)
Computer Software CygLink allows remote logging and viewing of A-scan graphs
Survey and report generation to PDF file
Graphic analysis of data and statistical calculations
Environmental Rating IP67
Safe operation in Explosive Atmospheres: Class I, Division 2, Group D Locations only, as defined in the National Fire Protection Association Code (NFPA 70), Article 500. Tested using MIL-STD-810G, Method 511.5, Procedure I
MIL STD 810G Method 501.6 (high temp +55°C (131°F))
MIL STD 810G Method 502.6 (low temp -20°C (-4°F))
MIL STD 810G Method 507.6 (humidity 95%)
MIL STD 810G Method 512.6 (immersion 1 metre for 30 mins)
Shock and Impact MIL STD 810G Method 514.7 (vibration)
MIL STD 810G Method 516.7 (shock 20g)
MIL STD 810G Method 516.7 (transit drop 1.22 m)
Standards Designed for EN 15317
Compliance CE, UKCA, RoHS
Warranty 3 years on gauge and 6 months on probe


Basic Gauge Kit

  • Cygnus 6+ gauge fitted with hand strap
  • Operating manual
  • Neck strap
  • Accessory pouch, containing; 3 x AA batteries, blue couplant gel
  • USB memory stick with CygLink installer
  • USB Lead

Kit supplied with Single Element Probe

  • Ultrasonic probe
  • Moulded probe cable
  • 15 mm (or ½ inch) steel test block
  • Spare membranes
  • Membrane key
  • Membrane couplant.

Kit supplied with Twin Element Probe

  • Ultrasonic probe
  • Moulded probe cable.

To compliment our ultrasonic thickness gauges we offer a range of ultrasonic probes. The performance of any ultrasonic thickness gauge relies heavily on the probe and its suitability to the material being measured. Therefore, selecting the right probe is vital. All Cygnus’ probes are made from stainless steel and have a hard wear face or a wear membrane to protect the probe.

Variety of Cygnus INOX Probes

  • Stainless steel SINGLE CRYSTAL probes, used in multiple-echo mode, include replaceable membranes for long life, require no zeroing and have a high linear accuracy.
  • Stainless steel TWIN CRYSTAL probes, used in echo-echo and single-echo modes, have improved measurability on extreme back wall corrosion and pitting.
  • Probes for use with the Cygnus 2+, 4, 4+ and 6+ gauges are fitted with a BNC or Lemo 00 connector.

Single Crystal Probes


Twin Crystal Probes


High Temperature Probe

Twin element ultrasonic probe designed for high-temperature, in-service thickness measurements and corrosion surveys across oil & gas, refining, energy and process sectors.

  • No cooling period required – reducing inspection time and facilitating effective measurement
  • For use on hot surfaces up to 300°C
  • Measures remaining wall thickness from 1.5 to 250 mm (0.05 to 9.8 inch) – depending on temperature and material.

5 reviews for Cygnus 6+ PRO

Stewart D.

Jul 18, 2016 11:05 AM

I would like to express our appreciation regarding Cygnus’ support during a recent umbilical manufacturing verification project. Your customer service was exemplary and we are impressed by the legibility of the readout on the Mk5 gauge. On appraising Cygnus of the background to our requirement, the equipment was despatched and received the next day. Its ease of use means that we will certainly call upon you for any further such requirements. Thanks for your assistance.

Ricky T.

Mar 27, 2017 11:04 AM

Getting to grips with it, it’s had a little use I think it’s showing about 20hrs on the opening screen. I like the new style and display also like the wrist mount. Not used the data logging yet but I am sure I will. A pleasure to do business with you and I am sure I will be back again in the future.

Agboola O.

Apr 24, 2017 11:07 AM

first time I believed is going to perform well

Blagoja S.

Oct 01, 2019 11:02 AM

We have purchase 4 pcs. of Cygnus 4+ UTG Kit and 1 pcs. of Cygnus 6+ UTG Kit. With these instruments we have check more that 3.000.000 points on coated steel pipe. Results were among expected. We are more than satisfied with equipment.

Mr Hernandez

May 06, 2020 11:06 AM

We tried the gauge on steel components of civil structures and it gives really accurate readings.

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Cygnus 6+ PRO Brochure

Cygnus Surface Gauge Family Brochure

Cygnus Surface Range Comparison Guide

Cygnus 6+ PRO – Consumables Reorder Form


Simple Menu Operation

Radial Points

Auto-Logging Measurements

How to Add Data Logging Comments

How to Set Limit Alerts

How to Review and Save B-Scans