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Cygnus 2+ Hands Free Multi-Mode Ul Thickness Gauge

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The Cygnus 2PLUS is a simple to use, multi-mode thickness gauge having Multiple-Echo, Echo-Echo and Single-Echo capabilities. The rotatable end-mounted display makes it ideally suited for climbing and rope access.

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 certified to the demanding US MIL STD 810G standard.

Perfect for use on flat plate, curved surfaces or pipes our Multiple-Echo single crystal probe technology means you can measure through thick coatings and only the remaining metal thickness is displayed.

The unit still relies on Multiple-Echo to provide simple and accurate measurements, with the added benefit of Echo‑Echo and Single-Echo using twin crystal probes for extreme corrosion. Echo-Echo for measurements on painted metals but with heavy back wall corrosion / pitting and Single‑Echo for measurements on uncoated surfaces with heavy front face and/or back-wall corrosion and attenuative materials such as cast metals or plastics / composites.


  • Multiple-Echo for reliable, accurate through coating measurements as specified by Classification Societies
  • Single-Echo and Echo-Echo measuring modes with twin crystal probes for extreme corrosion and back wall pitting
  • MSI™ (Measurement Stability Indicator) used in Single-Echo and Echo-Echo measurement modes
  • Hands free operation: wrist, waist belt and harness mountable
  • OLED multi-functional rotatable display for all lighting conditions
  • Extremely rugged enclosure – shock and impact to US MIL STD 810G
  • Environmental sealing to IP67 – US MIL STD 810G
  • Cygnus echo strength bars to assist quick measurements
  • Buttons integral with the TPE moulding and designed for minimum 100,000 depressions.

Cygnus Probes and Cables

Cygnus Stainless Steel INOX Probes (Single Crystal Probes)

The INOX probes have an updated ergonomic design and easier to read frequency, identification and serial number. All frequencies of INOX probes have a black face and a colour coding system to identify probe frequencies. Used in Multiple-Echo mode, these probes require no zeroing, have a high linear accuracy, are ideal for general thickness gauging, for use on pipes and have replaceable wear membrane for long life.

Cygnus Stainless Steel INOX Probes (Twin Crystal Probes)

Used in Echo-Echo and Single-Echo modes for a focussed ultrasound beam for improved measurability on extreme back wall corrosion and pitting.

Cygnus Cables

Using standard industry connectors the probe lead uses a custom made over moulded cable that offers superior flexibility and resistance to oils and ultraviolet light. The cable will not stiffen after exposure to ultraviolet light.

Flexible Handling

Along with the wrist and neck straps supplied in the kit there is also an optional belt clip, offering a range of flexible handling solutions for all types of applications.


MaterialsSound velocities between 1000 - 9000 m/s - covers virtually all common engineering materials
Accuracy±0.1 mm or 0.1% of thickness measurement, whichever is greatest, when calibrated in accordance with Cygnus Instruments calibration procedure
ResolutionMultiple-Echo mode - 0.1 mm or 0.05 mm
Single-Echo and Echo-Echo modes - 0.01 mm
ProbesSingle crystal probes: 
  • 6 mm - 5 MHz (S5A)
  • 13 mm - 2.25 MHz (S2C (standard)), 3.5 MHz (S3C) or 5 MHz (S5C)
  • 19 mm - 2.25 MHz (S2D)
Twin crystal probes: 
  • 5 mm - 7.5 MHz (T7A)
  • 8 mm - 5 MHz (T5B (standard))
  • 13 mm - 2 MHz (T2C (for attenuative materials such as cast metals, plastics and composites))
Measurement Range in SteelSingle crystal probes in Multiple-Echo: 
  • 3 - 250 mm with 2.25 MHz probe (S2C/D)
  • 2 - 150 mm with 3.5 MHz probe (S3C)
  • 1 - 50 mm with 5 MHz probe (S5C/A)
Twin crystal probes in Single-Echo: 
  • 2.5 - 250 mm with 2 MHz probe (T2C)
  • 1 - 200 mm with 5 MHz probe (T5B)
  • 0.8 - 50 mm with 7.5 MHz probe (T7A)
Twin crystal probes in Echo-Echo: 
  • 5 - 50 mm with 2 MHz probe (T2C)
  • 4 - 50 mm with 5 MHz probe (T5B)
  • 3 - 25 mm with 7.5 MHz probe (T7A)
ConnectorTwin Lemo 00
Power3 x AA batteries
Battery Life10 hours minimum
ElectronicsDual channel pulser
DisplayEnd-mounted OLED (rotatable) 
Size132 x 82 x 34 mm
Weight300 grams (inc. batteries)
Operating Temp.-10°C to 50°C 
Environmental RatingIP67 (dust tight and immersion - 1 metre for 30 mins)
Explosive Atmosphere: Safe operation as defined by Class I, Division 2, Group D, as found in the National Fire Protection Association Code (NFPA 70), Article 500, and tested using MIL STD 810G Method 511.5, Procedure I
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 ImpactMIL 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) 
ComplianceCE, British Standard BS EN 15317:2013
EnvironmentalRoHS, WEEE compliant
Warranty3 years on gauge and 6 months on probe
Kit Content

Cygnus 2PLUS UT gauge; padded carry case; operating manual; adjustable neck strap and loops; wrist strap; accessory pouch; spare membranes; surface and membrane couplant; test block; 3 x AA batteries; mini USB - USB cable and instruction manual optional Krusell® belt clip.

For more Cygnus product information, please click here.