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Cygnus 4+ ultrasonic thickness gauge

Cygnus 4+ ultrasonic thickness gauge magnify

The Cygnus 4PLUS is a small and tough multi-mode ultrasonic thickness gauge which features an A-scan display and simple to use sequential data logging.

Designed for use in harsh environments, with a simple to use keypad, intuitive menus and a colour LCD display.

The twin shot injection moulded enclosure has a soft but durable TPE outer skin which is comfortable to hold and protects against bumps while the hard internal shell offers maximum strength and environmental protection. 

Built in the UK using only genuine and original parts and components – including Lemo® Connectors and Peli® Cases. 


  • Uses Single and Twin Crystal Probes
  • A-scan display
  • Basic Data Logging
  • Explosive atmosphere: Safe operation, tested to MIL STD 810G method 511.5 procedure I
  • Shock and impact to US MIL STD 810G
  • Environmental sealing (water and dust proof) to IP67 – US MIL STD 810G
  • Measures using Multiple-Echo, Single-Echo and Echo-Echo
  • One and two point calibration
  • Manual gain mode
  • 3 measuring modes :-

Multiple-Echo (Single Crystal Probes)

uses three error checked back wall echoes to provide the most reliable and accurate remaining thickness measurements, with no need to remove coating (up to 20mm thick (0.8").

Echo-Echo (Twin Crystal Probes)

measures through coatings of up to 1mm (0.04") thick, ideal for measuring painted metals with back wall corrosion.

Single-Echo (Twin Crystal Probes)

ideal for measuring uncoated metals with heavy back-wall corrosion. Also effective on a range of cast metals, plastics and composites.

Kit Content

Cygnus 4 ultrasonic thickness gauge, padded carry case, operating manual, adjustable neck strap and loops, wrist strap, accessory pouch, spare membranes, couplant, test block, batteries, mini USB - USB cable and instruction manual 


Cygnus Stainless Steel INOX Probes (Single Crystal)

Used in Multiple-Echo mode, these probes include replaceable membranes for long life, require no zeroing and have a high linear accuracy. 

Cygnus Stainless Steel INOX Probes (Twin Crystal)

Used in Echo-Echo and Single-Echo modes, these probes have improved measurability on extreme back wall corrosion and pitting.

Krusell® belt clip and attachments accessory

Made in Britain

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