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Cygnus Multiple Echo Ultrasonic
Thickness Gauges for Metal Walls

Cygnus Ultrasonic Thickness Gauges can be calibrated for all metal types. They have stable calibration, linear accuracy, and no zero adjustment. All probes are protected by a membrane to prevent wear and damage to the probe face. Single-crystal probes ensure accurate measurements on curved backwalls.


Overview | Cygnus 1 Heavy Duty | Cygnus 1 Intrinsically Safe | Cygnus 1 Underwater | Cygnus 2 Hands Free |
Cygnus 3 Data Logger | Cygnus 4 General Purpose | Cygnus Mini ROV | Cygnus Dedicated ROV

Cygnus Ultrasonic Thickness Gauge Models:

Cygnus 1 Heavy Duty Ultrasonic Thickness Gauge

A tough, rugged Ultrasonic Thickness gauge using Multiple Echo technology, designed for use in demanding environments indoors or outdoors. Supplied ready to use as a complete kit in a protective carry case.

  • Heavy duty sealed unit resists water, dirt and dust.
  • Rugged construction - shock proof.
  • Stable calibration - linear accuracy - no zero adjustment.
  • Self-verification of measurements ensures accuracy.
  • Various probe options.
  • Displays sound velocity and echo strength.
  • Bright LED display with polarized filter.
  • Probe frequency selectable
  • Low battery warning
  • Metric / Imperial switchable

Typical Applications:
Pipeline inspection, general industry, offshore industry, bridge inspection.

 
Cygnus 1 / IS Intrinsically Safe Ultrasonic Thickness Gauge
  • Certified Intrinsically Safe to Ex II 1 G EEx ia IIC T6.
  • For use in hazardous areas.
  • No plant shut down or hot work permit necessary.
  • Heavy duty sealed unit - water / dirt / dust resistant.
  • Rugged construction - shock proof.
  • Stable calibration - linear accuracy - no zero adjustment.
  • Self verification of measurements to ensure accuracy.
  • Rechargeable batteries with charger.
  • Displays sound velocity and echo strength.
  • Probe frequency selectable.
  • Metric / Imperial switchable.

Typical Applications:
Pipeline inspection, petrochemical industry, offshore industry, shipping industry.

 
Cygnus 1 Underwater Ultrasonic Thickness Gauge

Used by divers around the world for submerged pipeline and vessel inspections.

  • Pressure rated to depths of 1,000 ft (300 m).
  • Heavy-duty seal with double "O" ring protection.
  • Remote probe with 3 ft (0.9 m) lead length.
  • Rugged, durable, shock-proof construction.
  • Stable calibration, no zero adjustment.
  • Various probe options.
  • Rechargeable batteries with charger.
  • Large, bright LED display.
  • All probes protected by membrane.
  • Measurements self-verification to ensure accuracy.
  • Echo strength indicator to aid measurement.

Typical Applications:
Shipping industry, pier & pipeline inspection, underwater pipelines, offshore industry, bridge inspection.

 
Cygnus 2 Hands Free Ultrasonic Thickness Gauge
  • Hands free operation.
  • Belt/harness clip and neck strap included.
  • Light, rugged, small, shock-proof
  • Sealed to NEMA-4 (IP65).
  • Simple keypad operation.
  • Measurements error checked using 3 return echoes.
  • Display brightness automatically adjusted to ambient light.
  • Accurate measurements on curved and heavily corroded back walls.
  • Accepted by all major classification societies.
  • Gauge senses probe type and automatically adjusts settings for optimum performance.
  • Displays sound velocity settings
  • Metric / Imperial switchable

Typical Applications:
Shipping industry, offshore industry, bridge inspection, tank and pipeline inspections.

 
Cygnus 3 Datalogging Ultrasonic Thickness Gauge
  • Records and organizes measurements in Single, Grid and Multipoint Geometries.
  • Backlit graphic LCD and end-mounted LED displays.
  • Windows® software for easy data transfer to computer.
  • Can be carried on the waist belt for ease of climbing.
  • Highly water / dirt / dust resistant.
  • Rugged construction - shock proof.
  • Stable calibration, linear accuracy, no zero adjustment.
  • Measurement self verification to ensure accuracy.
  • Echo strength displayed to aid measurement.
  • Probe protected by a membrane against wear and tear.
  • Metric / Imperial switchable

Typical Applications:
Tank inspection, vessel & boiler tube inspection, bridge inspection, lighting column inspection, general industry, pipe inspection, road tankers.

 
Cygnus 4 Ultrasonic Thickness Gauge
  • Backlit digital LCD display for viewing in sunlight.
  • Rugged construction, shock proof, protected to IP65.
  • Stable calibration, linear accuracy, no zero adjustment.
  • Measurement self-verification.
  • Various probe options.
  • Displays sound velocity and echo strength.
  • Calibrates to a known thickness or a known velocity.
  • Probe frequency selectable.
  • Low battery warning.
  • Metric / Imperial switchable

Typical Applications:
Shipping industry, tank, vessel & boiler tube inspection, offshore industry, bridge inspection, lighting column inspection, pipe inspection, road tankers.

 
Cygnus Mini ROV Underwater Ultrasonic Thickness Gauge
  • Pressure tested to 500 m (1,640 ft).
  • Optional dedicated probe holder to allow measurements on curved or flat surfaces.
  • Small, lightweight and easy to install.
  • Single twisted pair to transfer data to urface.
  • Power supply taken locally from ROV.
  • Probe does not need to touch surface under test.
  • Measurements can be taken through 5 mm of water.
  • Readings not influenced by the probe orientation.
  • Dedicated software for topside PC display of measured results, data storage and setting gauge calibration.

Typical Applications:
Shipping industry, deepwater pipeline inspection, offshore industry, pier & piling inspection.

 
Cygnus Dedicated ROV Underwater Ultrasonic Thickness Gauge
  • Model pressure tested to 1000 m (3,300 ft).
  • Model pressure tested to 3000 m (10,000 ft).
  • 5 m of probe cable for routing around most ROVs.
  • Power supply taken from ROV.
  • Single twisted pair to transfer data to surface.
  • Probe does not need to touch surface under test.
  • Measurements can be taken through 5 mm of water.
  • Readings not influenced by the probe orientation.
  • Dedicated software for topside PC display of measured results, data storage and setting gauge calibration.

Typical Applications:
Shipping industry, deepwater pipeline inspection, offshore industry, pier & piling inspection.

 

Cygnus Multiple Echo Technology

With multiple echo technology, readings are taken by measuring the time delay between any three consecutive backwall echoes. The time T1 (for coating thickness) is ignored. The times T2 and T3 are equal to the time that it takes for sound to travel through the metal. Only by looking at three echoes can the measurements be made for the metal thickness, where T2 = T3.

Common Applications

Pipe wall thickness measurements...

  • To confirm adequate wall thickness prior to arc welding for hot taps, fittings, repairs or encirclement wraps
  • To confirm adequate wall thickness prior to fusion welding of test leads or cathodic protection leads or anodes
  • To detect internally corroded areas
  • To detect laminations
  • To monitor effectiveness of inhibitors
  • For X-ray for correct exposure time

External measurements to confirm exact locations of anomalies detected by "smart pigs" prior to expensive...

  • Coating removal
  • Cutting into line or other repairs

Tank wall thickness measurements...

  • To meet the requirements of API Standard 653 for Above Ground Storage Tanks
  • To test for corrosion on other tanks (bullets, spheres, etc.)

Prove adequate remaining wall thickness after external damage due to...

  • Line hit
  • External corrosion
  • External wear abrasion

Wall thickness measurement for quality control of materials on receipt.
 
 

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