DIVER-HELD MULTIPLE ECHO
ULTRASONIC DIGITAL THICKNESS GAUGE
Measures metal thickness to determine wastage or corrosion
accurately, quickly and without removing protective coatings
![wt-1](https://thaihoadiving.com/wp-content/uploads/2021/06/wt-1.jpg)
![wt-3](https://thaihoadiving.com/wp-content/uploads/2021/06/wt-3.jpg)
![wt-2](https://thaihoadiving.com/wp-content/uploads/2021/06/wt-2.jpg)
![wt-4](https://thaihoadiving.com/wp-content/uploads/2021/06/wt-4.jpg)
Features
- RINA approved (Certificate No. 2009DGPO787)
- Auto – Probe Recognition (APR)
- “Deep-Coat” mode for measuring through coatings up to 20 mm
(3/4″) thick - Easy calibration using convenient buttons
- Rugged, durable, shock-proof construction
- Stable calibration – linear accuracy – no zero adjustment
- Large bright LED display for poor visibility
- Pressure rated to 300 m (1,000 ft) depth
- Heavy-duty sealed unit with double ‘O’ ring protection
- Self verification of measurements to ensure accuracy
- Echo strength indicator to aid measurement
- All probes are protected by a membrane to prevent damage
- Various probe options
- Two rechargeable battery packs with charger
- Fixed head probe option for single-handed use.
Benefits of Cygnus Multiple Echo
- 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.
With multiple echo, readings are taken by measuring the time delay
between any three consecutive backwall echos. The time of T1
(coating thickness) is ignored. The times of T2 and T3 are equal to the
time that it takes to travel through the metal. Only by looking at three
echoes can the measurements be automatically verified
(where T2 = T3).
![wt-5](https://thaihoadiving.com/wp-content/uploads/2021/06/wt-5.jpg)
![wt-6](https://thaihoadiving.com/wp-content/uploads/2021/06/wt-6.jpg)
Gauge Kit Contents
The instrument, heavy-duty remote 2.25 MHz 13 mm (1/2″) diameter probe, nose cone tommy bar, probe locking ring key, 2 rechargeable batteries, and battery charger, spare membranes and ‘O’ rings, steel test block, lanyard, operation manual, pressure test and calibration certificates, Molykote grease and carry case.
- Cygnus UW Gauge Body.
- Lanyard & Molykote.
- Two Rechargeable NiMH Battery Packs.
- Battery Charger and Leads.
- Nosecone, Cable & Remote Probe (1.5 m).
- Membrane Couplant.
- Accessories: Spare O-Rings, Spare Membranes, Membrane. Locking Ring Key, 15 mm (½”) Test block, Tommy Bar.
The Operating Manual and Documentation are attached to the lid of the case.
Applications
Maintenance and safety checks of metal thickness for:
- Ships hulls
- Semi substructures
- Anchor chains
- Subsea pipelines
- Offshore structures, jackets
- Storage vessels, FPSO’s
- Dock gates, piers, jetties, and pipings.
…plus many more.
![wt-8](https://thaihoadiving.com/wp-content/uploads/2021/06/wt-8.jpg)
![wt-7](https://thaihoadiving.com/wp-content/uploads/2021/06/wt-7.jpg)
Specification
Materials
Sound velocities between 2000 m/s and 7000 m/s (0.059 and 0.31 in/microsec) -covers virtually all common engineering materials
Measurement
Range in Steel
3 mm – 250 mm (0.110″ – 9.995″) with 2.25 MHz probe
2 mm – 150 mm (0.065″ – 6.000″) with 3.5 MHz probe
1 mm – 50 mm (0.045″ – 4.000″) with 5.0 MHz probe
Accuracy
0.1 mm (0.005″) when calibrated in accordance with Cygnus Instruments
Calibration Procedures
Resolution
0.1 mm or 0.05 mm (selectable) (0.005″ or 0.002″)
Probes
Remote single crystal soft-faced
compression
6 mm (1/4″) – 5 MHz
13 mm (1/2″) – 2.25, 3.5 or 5 MHz
19 mm (3/4″) – 2.25 MHz
(Lower frequency probes offer better
penetration on heavy corrosion/coatings)
Power
NiMH rechargeable battery pack
Battery Life
30 hours’ (continuous measuring)
Display
Large, bright LED display
Size
235 mm x 75 mm (8 3/8″ x 3″)
Weight
950 g (2.1 lbs) – with remote probe
860 g (30.3 oz) – with fixed head probe
Operating Temp.
-10°C to +50°C (14°F to 122°F)
Environmental
Protection
IPX8 continuous 300 m (984 ft) rating
Compliance
CE, British Standard BS EN 15317:2013
(Specification for the characterisation and verification
of ultrasonic thickness measuring equipment)
Environmental
RoHS, WEEE compliant