Cygnus 1 Intrinsically Safe

Ultrasonic Thickness Gauge

Certified to Zone 0 for ATEX, IECEx and UKEx, and Class 1, Division 1 for CSA-US, the Cygnus 1 requires no plant shutdown or hot work permit when taking ultrasonic thickness measurements in hazardous / potentially explosive atmospheres. The gauge employs the Multiple-Echo technique to give accurate, self-verified measurements without removing protective coatings.

Key Features of the Cygnus 1 Intrinsically Safe:

  • Certified Intrinsically Safe to:
    II 1 G Ex ia IIC T6 Ga (Tamb = -20°C to 40°C)
    I M 1 Ex ia I Ma (Tamb = 0°C to 45°C)
    Certificate No. BAS00ATEX1108
    II 1 G Ex ia IIC T6 Ga (Tamb = -20°C to 40°C)
    I M 1 Ex ia I Ma (Tamb = 0°C to 45°C)
    Certificate No. BAS21UKEX0661
    Ex ia IIC T6 Ga (Tamb = -20°C to 40°C)
    Ex ia I Ma (Tamb = 0°C to 45°C)
    Certificate No. IECEx BAS 19.0021
    Class 1 Group A, B, C, D Division 1
  • For use in Zone 0, Zone 1 hazardous areas
  • No plant shutdown or hot work permit necessary
  • Approved for use in mines
  • Echo strength indicator to aid measurement
  • Stable calibration, linear accuracy, no zero adjustment
  • Self-verification of the measurements to ensure maximum accuracy
  • Two rechargeable battery packs with charger
  • Displays sound velocity settings
  • Right angle probe for use in areas of restricted access
  • Probe frequency selectable
  • Metric / imperial switchable
  • Low battery warning.

Cygnus-Pioneered Multiple-Echo Technique:

  • Measures remaining metal thickness on corroded and coated structures
  • All measurements are error checked using 3 return echoes to give repeatable, reliable results
  • Accepted by all major classification societies
  • Greatly reduces inspection time and costs
  • Echo strength indicator to aid measurement.
Measuring Mode Multiple-Echo using 3 echoes to ignore coatings
Materials Velocities from 2000 – 7000 m/s (0.059 – 0.31 in/us) – covers virtually all common engineering materials
Accuracy ±0.1 mm (±0.004 inch) or 0.1% of thickness measurement, whichever is greatest, when calibrated in accordance with Cygnus Instruments calibration procedure
Resolution 0.1 mm (0.004 inch) or 0.05 mm (0.002 inch) (selectable)
Probe Options Single crystal probes
Measurement Range in Steel 1 – 250 mm (0.040 – 10 inch) depending on selected probe and configuration, material and temperature
Power NiMH rechargeable battery pack
Battery Life 12 hours’ continuous operation
Display Bright LED display
Size 235 x 75 mm (9.252 x 3 inch)
Weight 910 g (32 oz) with remote probe (inc. batteries)
Operating Temp. -10°C to +50°C ( 14°F to 122°F)
Certification ATEX
II 1 G Ex ia IIC T6 Ga (Tamb = -20°C to 40°C)
I M 1 Ex ia I Ma (Tamb = 0°C to 45°C)
Certificate No. BAS00ATEX1108UKEX
II 1 G Ex ia IIC T6 Ga (Tamb = -20°C to 40°C)
I M 1 Ex ia I Ma (Tamb = 0°C to 45°C)
Certificate No. BAS21UKEX0661IECEx
Ex ia IIC T6 Ga (Tamb = -20°C to 40°C)
Ex ia I Ma (Tamb = 0°C to 45°C)
Certificate No. IECEx BAS 19.0021CSA
Class 1 Group A, B, C, D Division 1
Environmental Protection IP65
Standards Designed for EN 15317
Warranty 3 years on gauge and 6 months on probe
  • Instrument body
  • Battery module
  • Heavy Duty remote probe
  • Battery charger
  • Bottle of couplant
  • Bottle of membrane oil
  • Membranes
  • O-rings
  • Nose cone torque bar
  • Calibration jumper lead
  • Locking ring key
  • Steel test block
  • Calibration trim tool
  • Hex key.
Weight 5 kg

Cygnus 1 Intrinsically Safe Gauge Standard Kit with S2C 2.25MHz 13mm Standard Probe, Cygnus 1 Intrinsically Safe Gauge Standard Kit WITHOUT PROBE

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 SINGLE CRYSTAL probes are made from stainless steel and include replaceable membranes for long life, requiring no zeroing and have a high linear accuracy.

7 reviews for Cygnus 1 Intrinsically Safe

Graeme S.

Feb 17, 2016 10:45 AM

I love this machine. Even for corroded areas, it has proven to be reliable. I like the fact that you can change the Db settings to enable better penetration and sensitivity on corroded surfaces. We have to use Ex certified equipment in the offshore oil and gas industry which makes this UTM gauge ideal. I would give it an 8/10. (Only because it’s design makes it awkward to use when the operator is using Rope Access as a means of carrying out the inspection.)

Leslie L.

Aug 12, 2016 10:43 AM

This will certainly be useful in the inspection and maintenance of our shipping industry.

Lester B.

Jan 25, 2018 9:55 AM

I really like this piece of equipment, very reliable, I do recommended to others, specially to use on oil and gas plants, I been using my for over 10 years, right now I’m looking forward to purchase a next one, probably I will go with same type since not really hard with calibration, is true a little awkward to use on such position, like hanging or under pipelines. But not a big deal.

Diana R.

Jan 26, 2018 9:56 AM

It is an old gauge (intrinsically safe) but keeps working well.

Anthony B.

Jan 26, 2018 9:56 AM

Intrinsically Safe is reliable, easy to use and accurate

Santosh G.

Apr 23, 2020 10:36 AM

There are many in the industry who have been using Cygnus meters for more than 20 years. I myself have used their underwater thickness gauge along with regular and Intrinsically Safe UT meters from the early stages of my career – and that goes back to more than 25 years for sure. As a global leader of inspection services, we use Cygnus Gauges for pipelines, tanks and vessel inspections. Our operators particularly love Cygnus – as readings come quick and accurate.

Jagdeep S.

May 19, 2020 10:28 AM

Last weekend we urgently needed an Ex Rated machine to attend a vessel in Antwerp .It was Thursday evening , urgent job, as they always are , and we realize our existing machines are out on the field. I sent one whatsapp mssg to Ribu Samuel K. and Chih Ju WEI at Cygnus , our trusted partners for 20 years in supplying UTM equipment ( our first machine purchased 20 years ago is still working ) , 36 hrs later we had our machine in Rotterdam office. The PO’s the RFQ’s the payments all looked after themselves in due course. Take a bow guys , bloody marvelous.

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