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Cygnus 4+ - CYG-050-4500-S2C-T5B General Purpose Multi-Mode Ultrasonic Thickness Gauge includes probes and leads


Product Description


  • Multiple-Echo for reliable, accurate through coating measurements
  • Single-Echo and Echo-Echo measuring modes
  • Large bright color LCD screen with automatic LCD back light
  • Min / max measurement limit functions with visual and vibrate alert
  • Extremely rugged enclosure - shock and impact to MIL STD 810G
  • Environment sealing to IP67 - MIL STD810G
  • Deep-coat mode, measures through coatings up to 20 mm (¾") thick
  • Cygnus echo-strength bars assist thickness measurements in Multiple-Echo mode
  • TPE over molded enclosure
  • Buttons designed for minimum of 100,000 depressions
  • Fully sealed battery compartment (contains any leaking battery fluids)
  • A-scan display
  • MSI™ (Measurement Stability Indicator) for Single-Echo and Echo-Echo modes
  • Sequential data logging
  • Automatic probe recognition for S2C and twin crystal probes

Multi-Measuring Mode:

  • Multiple-Echo uses three back wall echoes and measures remaining metal thickness while ignoring coatings. All measurements are error checked using 3 return echoes to give repeatable, reliable results. Accepted by all major classification societies. Uses single crystal probes for linear accuracy (and no probe zero required).
  • Echo-Echo uses two back wall echoes and measures remaining metal thickness while ignoring coatings up to 1 mm (0.04") thick using twin crystal probes for improved detection of back wall corrosion and pitting.
  • Single-Echo uses one back wall echo, measures remaining metal thickness on uncoated surfaces and is possibly helpful for areas with extreme front face or back wall corrosion and pitting. Effective on highly attenuative materials such as cast metals, plastics and composites.

Cyglink Software:

  • CygLink is a Windows® application which is used to transfer information from the Cygnus 4+ thickness gauge to a computer. The information can then be used to create reports which can be analyzed, stored and exported.

MSI™ (Measurement Stability Indicator):

  • This clever technique helps ensure only stable measurements are displayed in Echo-Echo and Single-Echo modes. Displayed measurements change color from red to green and vibrate alert to indicate a stable reading.
  • Only available when using a twin probe.

Data Logging:

  • Data logging record format using linear based measurements
  • 5,000 measurement points (including A-scan) per record (records quantity dependent on SD card capacity)
  • The user can log 'obstructed' and 'no reading' if no thickness measurement can be obtained
  • There are menu functions to: step back; retake-last; stop and resume logging; review measurements; protect records; delete records
  • Data logging screen shows average, highest and lowest thickness measurement values from the record
  • Records can have optional minimum and reference thickness values set which are used to highlight logged measurements, i.e. red if under min, green if between min and ref.
  • Records are saved to removable micro-SD card
  • Records are easily transferred to a computer via USB and CygLink software where they can be examined, saved, turned into a PDF report or exported to a CSV file.

CYGNUS 4+ General Purpose Multi-Mode Ultrasonic Thickness Gauge – P/N CYG-050-4500-S2C-T5B Includes:

  • (1) Padded Carry Case
  • (1) Probe S2C Single 2.25MHz 13mm with BNC connector with Probe Lead Twin Lemo 00 to BNC 1.35m (4'6")
  • (1) Probe T5B Twin 5MHz 8mm (1/3") with Twin Lemo 00 connector with Probe Lead Twin Lemo 00 to Twin Lemo 00 1.35m (4'6")
  • (3) AA Batteries
  • (1) Adjustable Neck Strap and Loops
  • (1) Wrist Strap
  • (1) Accessory Pouch
  • Spare membranes
  • (1) Surface and Membrane Couplant
  • (1) Steel Test Block
  • (1) Data Transfer Cable
  • (1) SD Card
  • Operation Manual


  • Materials: Sound velocities between 2000 - 9000 m/s (0.079 - 0.35 in/ms) - covers virtually all common engineering materials
  • Accuracy: ±0.1 mm (±0.004”) or 0.1% of thickness measurement, whichever is greatest, when calibrated in accordance with Cygnus Instruments calibration procedure
  • Resolution: Multiple-Echo mode - 0.1 or 0.05 mm (0.005" or 0.002") / Single-Echo and Echo-Echo modes - 0.01 mm (0.0004")
  • Probes:
    • Single crystal probe: 13 mm (½”) - 2.25 MHz (S2C (standard))
    • Twin crystal probe: 8 mm (0.3") - 5.0 MHz (T5B (standard))
  • Measurement Range in Steel:
    • Single crystal probe: 3 - 250 mm (0.120" - 10.00") with 2.25 MHz probe (S2C/D)
    • Twin crystal probe: 2 - 200 mm (0.080" - 7.900") with 5.0 MHz probe (T5B)
  • Connector: Twin Lemo 00
  • Power: 3 x AA batteries
  • Battery Life: 10 hours minimum
  • Electronics: Dual channel pulser
  • Display: 2.4" quarter VGA LCD
  • Size: 5.20 in. x 3.23 in. x 1.34 in.) (132 mm x 82 mm x 34 mm)
  • Weight: 300 grams (10.58 oz) includes batteries
  • Operating Temp: 14°F to 122°F (10°C to 50°C)
  • Data Logging: Capacity for up to 5000 points including A-scans
  • 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. Designed for Windows 7 and Windows 8.
  • Environmental Rating
    • IP67
    • MIL STD 810G Method 501.6 (high temp +55°C)
    • MIL STD 810G Method 502.6 (low temp -20°C)
    • 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 - 1 hour each axis)
    • MIL STD 810G Method 516.7 (shock 20g - 11ms half sine shock pulse, 40g 11ms in each axis)
    • MIL STD 810G Method 516.7 (26 drops - transit drop 1.22 m)
  • Compliance: CE, British Standard BS EN 15317:2007 (Specification for the characterization and verification of ultrasonic thickness measuring equipment)
  • Environmental: RoHS, WEEE compliant
  • Warranty: 3 years on gauge, 6 months on probe

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